Comets
have inspired dread, fear, and awe in many different cultures and
societies around the world and throughout time. They have been branded
with such titles as "the Harbinger of Doom" and "the Menace of the
Universe." They have been regarded both as omens of disaster and
messengers of the gods. Why is it that comets are some of the most
feared and venerated objects in the night sky? Why did so many cultures
cringe at the sight of a comet?
When people living in ancient cultures looked up, comets were the most
remarkable objects in the night sky. Comets were unlike any other object
in the night sky. Whereas most celestial bodies travel across the skies
at regular, predictable intervals, so regular that constellations could
be mapped and predicted, comets' movements have always seemed very
erratic and unpredictable. This led people in many cultures to believe
that the gods dictated their motions and were sending them as a message.
What were the gods trying to say? Some cultures read the message by the
images that they saw upon looking at the comet. For example, to some
cultures the tail of the comet gave it the appearance of the head of a
woman, with long flowing hair behind her. This sorrowful symbol of
mourning was understood to mean the gods that had sent the comet to
earth were displeased. Others thought that the elongated comet looked
like a fiery sword blazing across the night sky, a traditional sign of
war and death. Such a message from the gods could only mean that their
wrath would soon be unleashed onto the people of the land. Such ideas
struck fear into those who saw comets dart across the sky. The likeness
of the comet, though, was not the only thing that inspired fear.
Ancient
cultural legends also played a hand in inspiring a terrible dread of
these celestial nomads. The Roman prophecies, the "Sibylline Oracles,"
spoke of a "great conflagration from the sky, falling to earth," while
the most ancient known mythology, the Babylonian "Epic of Gilgamesh,"
described fire, brimstone, and flood with the arrival of a comet. Rabbi
Moses Ben Nachman, a Jew living in Spain, wrote of God taking two stars
from Khima and throwing them at the earth in order to begin the great
flood. Yakut legend in ancient Mongolia called comets "the daughter of
the devil," and warned of destruction, storm and frost, whenever she
approaches the earth. Stories associating comets with such terrible
imagery are at the base of so many cultures on Earth, and fuel a dread
that followed comet sightings throughout history.
Comets'
influence on cultures is not limited simply to tales of myth and
legend, though. Comets throughout history have been blamed for some of
history's darkest times. In Switzerland, Halley's Comet was blamed for
earthquakes, illnesses, red rain, and even the births of two-headed
animals. The Romans recorded that a fiery comet marked the assassination
of Julius Caesar, and another was blamed for the extreme bloodshed
during the battle between Pompey and Caesar. In England, Halley's Comet
was blamed for bringing the Black Death. The Incas, in South America,
even record a comet having foreshadowed Francisco Pizarro's arrival just
days before he brutally conquered them. Comets and disaster became so
intertwined that Pope Calixtus III even excommunicated Halley's Comet as
an instrument of the devil, and a meteorite, from a comet, became
enshrined as one of the most venerated objects in all of Islam. Were it
not for a Chinese affinity for meticulous record keeping, a true
understanding of comets may never have been reached.
Unlike
their Western counterparts, Chinese astronomers kept extensive records
on the appearances, paths, and disappearances of hundreds of comets.
Extensive comet atlases have been found dating back to the Han Dynasty,
which describe comets as "long-tailed pheasant stars" or "broom stars"
and associate the different cometary forms with different disasters.
Although the Chinese also regarded comets as "vile stars," their
extensive records allowed later astronomers to determine the true nature
of comets.
Although most human beings no longer cringe at the sight of a comet,
they still inspire fear everywhere around the globe, from Hollywood to
doomsday cults. The United States even set up the Near Earth Asteroid
Tracking (NEAT) program specifically to guard us from these "divine"
dangers. However, although they were once regarded as omens of disaster,
and messengers of the god(s), today a scientific approach has helped
allay such concerns. It is science and reason that has led the fight
against this fear since the days of the ancients. It is science and
reason that has emboldened the human spirit enough to venture out and
journey to a comet. It is science and reason that will unlock the
secrets that they hold.
Image Captions:
Figure 1. Types of cometary forms, illustrations from Johannes Hevelius' Cometographia (Danzig, 1668) (Scan of original and caption from Don Yeomans' Comets: A Chronological History of Observation, Science, Myth and Folklore. Used with permission.) (View full size)
Figure 2. Woodcut showing destructive influence of a fourth century comet from Stanilaus Lubienietski's Theatrum Cometicum (Amsterdam, 1668) (scan of original and caption from Don Yeomans' Comets: A Chronological History of Observation, Science, Myth and Folklore. Used with permission.) (View full size)
Figure 3. German broadside showing comets
of 1680, 1682 (Halley), and 1683. The illustration shows a view of
Augsburg, Germany with the comets of 1680, 1682, and 1683 in the sky.
Three horsemen of the Apocalypse are in the foreground. The scene is
bordered by a clock face, the numerals of which are made of bones,
weapons, and instruments of torture. Each of the four corners outside
the dial contains an allegorical figure with an appropriate biblical
text. (Scan of original and caption from Don Yeomans' Comets: A Chronological History of Observation, Science, Myth and Folklore. Used with permission. Original provided by Adler Planetarium, Chicago) (View full size)
Figure 4. The Mawangdui silk, a 'textbook'
of cometary forms and the various disasters associated with them, was
compiled sometime around 300 B.C., but the knowledge it encompasses is
believed to date as far back as 1500 B.C. (View full size)
Bibliography
- "A Brief History of Comets I" European Southern Observatory. May 13 1997. 6/2/03. link
- Britt, Robert Roy. "Comets, Meteors & Myth," Space.com. Nov. 13 2001. 6/3/03. link
- "Comets in History (Does Ignorance Rule?)," University of Wisconsin, Board of Regents. 1999. 6/3/03. link
- "Comet History in a Capsule," Challenger Center for Space Science Education. 2002. 6/2/03. link
- Cumberlidge, Anne-Marie. "Comets in History," The Hitch-Hiker's Guide to Comets. Keele University. 1997. 6/03/03. link
- Houlding, Deborah. "Comets in History," Skycript. 6/3603. link
Kaisler, Denise. "Comet Misconceptions." link - Kobres, Bob. "Comets and the Bronze Age Collapse," CHRONOLOGY
AND CATASTROPHISM WORKSHOP. Society for Interdisciplinary Studies 1992,
number 1, pp.6-10. link - Yeomans, Donald K. Comets: A Chronological History of
Observation, Science, Myth and Folklore. John Wiley & Sons, Inc. New
York. 1991
Neat Links:
amazing-space.stsci.edu/resources/explorations/cometmyth/
www.arksky.org/thecomets.htm
Noah Goldman first started working with Deep Impact as a student
intern from the College Park Scholars program, a freshman-sophomore
living-learning community at the University of Maryland. Noah has
continued to work with the project working mostly on analysis but also
writing articles for the website.
NASA Finds 20 New Comets, 33,000-Plus Asteroids
Wed, 02 Feb 2011 09:21 CST
ibtimes
NASA said its Near-Earth Object WISE (NEOWISE) mission has discovered
20 comets and more than 33,000 asteroids in the main belt between Mars
and Jupiter, in addition to 134 near-Earth objects (NEOs).
NEOs
are asteroids and comets with orbits that come within 28 million miles
of Earth's path around the sun. A comet is an icy small Solar System
body that when close enough to the Sun displays a visible coma - a thin,
fuzzy, temporary atmosphere - and sometimes also a tail. Asteroids are
actually small solar system bodies orbiting around the sun.
NASA's
NEOWISE is an enhancement of the $320 million Wide-field Infrared
Survey Explorer (WISE) mission that was launched in Dec. 2009. WISE
scanned the entire celestial sky in infrared light about 1.5 times and
captured more than 2.7 million images of objects in space, ranging from
faraway galaxies to asteroids and comets close to Earth.
The latest findings will help in determining the objects' sizes and compositions.
NASA said by combining visible and infrared measurements, astronomers
can study the compositions of the rocky bodies like whether they are
solid or crumbly. The findings will lead to a much-improved picture of
the various asteroid populations.
NEOWISE data will help in the discovery of the closest dim stars, called brown dwarfs. These observations have the potential to reveal a brown dwarf even closer to us than our closest known star, Proxima Centauri, if such an object does exist.
Data from WISE and NEOWISE could also detect a hidden gas-giant planet in the outer reaches of our solar system, says NASA.
"Even just one year of observations from the NEOWISE project has
significantly increased our catalog of data on NEOs and the other small
bodies of the solar systems," said Lindley Johnson, NASA's program
executive for the NEO Observation Program.
NEOWISE confirmed the presence of objects in the main belt that already
had been detected. In just one year, it observed about 153,000 rocky
bodies out of about 500,000 known objects. Those include the 33,000 that
NEOWISE discovered.
NEOWISE also observed known objects closer to and farther from us than
the main belt, including roughly 2,000 asteroids that orbit along with
Jupiter, hundreds of NEOs and of course, more than 100 comets.
"You can think of Earth and the asteroids as racehorses moving along in a
track," said Amy Mainzer, the principal investigator of NEOWISE at
NASA's Jet Propulsion Laboratory in Pasadena, California.
"We're moving along together around the sun, but the main belt
asteroids are like horses on the outer part of the track. They take
longer to orbit than us, so we eventually lap them."
The data from NEOWISE on the asteroid and comet orbits are catalogued at
the International Astronomical Union's Minor Planet Center, a
clearinghouse for information about all solar system bodies at the
Smithsonian Astrophysical Observatory in Cambridge, Massachusetts.
The science team is analyzing the infrared observations now and will publish new findings in the coming months.
WISE is a NASA infrared-wavelength astronomical space telescope launched
on 14 Dec. 2009. In early October 2010, after completing its prime
science mission, the spacecraft ran out of frozen coolant that keeps its
instrumentation cold.Rather than abandoning the spacecraft, the NASA
Planetary division stepped in with a $400,000 one month program
extension called 'Near-Earth Object WISE' (NEOWISE) to search for small
solar system bodies close to Earth's orbit.
As the NEOWISE has successfully completed a full sweep of the main
asteroid belt, the WISE spacecraft will go into hibernation mode and
remain in polar orbit around the Earth, where it could be called back
into service in the future.
The first batch of observations from the WISE mission will be available to the public and astronomy community in April.
European Space Agency images of Mars reveal enormous impact craters
Fri, 04 Feb 2011 12:23 CST
ESA.int
ESA's Mars Express has returned new views of pedestal craters in the Red Planet's eastern Arabia Terra.
Craters are perhaps the quintessential planetary geological feature. So
much so that early planetary geologists expended a lot of effort to
understand them. You could say they put craters on a pedestal. This
latest image of Mars shows how the Red Planet does it in reality.
Craters are the result of impacts by asteroids, comets and meteorites.
In a pedestal crater, the surrounding terrain is covered by pulverised
rock thrown out of the crater. This material creates a platform or
pedestal around the crater often with steep cliffs, and is usually rich
in volatile materials such as water and ice.
Arabia Terra is part of the highlands of Mars, stretching east to west
across 4500 km in the northern hemisphere, and named for a feature drawn
on Giovanni Schiaparelli's 19th-century map of Mars.
The
whole area is characterised by steep-sided hills, valleys and ancient
impact craters that have been extensively resurfaced by old lava flows
and modified by profound erosion over millions of years. The eastern
areas rise up to 4 km above the low-lying north-western parts. To the
north, Arabia Terra drops and blends into the northern lowlands.
Pedestal craters are visible in this new view of a 159 km by 87 km
region of eastern Arabia Terra, taken by the High Resolution Stereo
Camera on ESA's Mars Express orbiter.
The large crater to the top centre has a pedestal that looks like a
skirt, rising almost up to the crater rim. Mounds and table mountains on
the floors of the larger craters show layered deposits that could be
the result of volcanic processes, or that may have been deposited by
wind or water.
In the north (right), layered deposits appear as smooth plains covering
the highlands. These were thought to have formed during the Late
Noachian and Early Hesperian eras, about 4 billion years ago.
Later, the deposits experienced heavy erosion by wind and partially by
water, leading to the variety of landscapes seen in this region today.
Plane crash alert may have been meteorite strike
Tue, 15 Feb 2011 08:45 CST
York Press
A meteorite strike may have led to emergency services receiving reports of a plane crash in the early hours today.
Fire crews from Selby, Tadcaster and West Yorkshire were called to the
Whitley Bridge area at about 12.20am as they investigated reports an
aircraft may have come down in the area.
However, the six teams did not find any aircraft which had crashed, and
North Yorkshire Fire and Rescue Service said a meteorite strike was
possibly the reason for the alert.
US: Daytime fireball roughly a 5-ton meteor, NASA estimates
Early Monday afternoon, a bright object flashed across the sky before
vanishing with a flash, according to scores of eyewitnesses from
Virginia to Massachusetts.
The likeliest explanation is that a large meteor - a space rock hurtling
through the atmosphere - passed eastward over the North Jersey-New York
City area.
It
might have been 5 feet in diameter with a weight of more 5 metric tons,
judging from reports that it blazed as bright as a full moon, said NASA
scientist Bill Cooke of the Marshall Space Flight Center.
He based his estimate on "a reasonable speed" of 33,500 m.p.h. Good thing it didn't hit anything.
"My crude estimate of the energy of this fireball is about 100 tons of
TNT, which means it was capable of producing a crater 125 feet in
diameter and about 15 feet deep, assuming an impact into sandstone,"
Cooke said.
The Earth's atmosphere, is strafed by such rocks about once a
month, usually over the oceans, and a similar event may have happened
near Jackson, Miss., on Jan. 11, he said.
Apparently, this intruder was much larger than the typical debris in
shooting stars or meteor showers. At night, even a grain of sand can
cause a bright streak across the sky.
Cooke said a better estimate would be available in a few days, after
data is collected from "infrasound stations to try to determine the
meteor's energy from the sound waves emitted as it flew through the
atmosphere."
Eyewitness reports put the time of Monday's fireball around 12:35 to 12:45 p.m. Eastern time.
Here's a sampling from reports to Meteor/Meteorite News:
-- "Egg Harbor, NJ. Silvery ball like 'shooting star' for about a second
or so across good portion of sky. Heard a bit of a woosh and then it
flashed out. Definitely a little intimidating but cool!"
-- "I saw the meteor that came down in Philly. Spectacular, bright came Almost straight down. Positioning reported by news inaccurate though."
-- "I saw a meteorite today in Bayonne, New Jersey between noon and 1pm.
It appeared out of nowhere in my line of sight coming down toward the
shoreline, and disintegrated about 100 feet above the ground in an instant!"
-- "Old Bridge, NJ Driving on Route 34- Saw a circular meteor appear
with long red flare ending- it was there for a seconds and gone
instantly- it glided like a shooting star -1pm in the afternoon- red as
can be!!"
Among more than 50 reports to the American Meteor Society were these:
-- "It fluxed all the colors of the rainbow akin to a ... oil sheen on
water. It was moving at breakneck speed. ... I don't want to sound weird
but it looked magical," wrote one New York City man.
-- "A true spectacle. Top 5 coolest things I have ever ... seen. I will
remember this fireball till death :) Love, Kurt," wrote a Unionville,
Pa., observer.
The accompanying map, created by Mike Hankey of Mike's Astro Photos, used early reports to approximate the fireball's path.
Shoot a photo or video of the fireball? Please contact the Inquirer Online News Desk at 215-854-2443 or online@phillynews.com.
Comet Tempel 1: Stardust photos reveal crater that 'partly healed itself'
The Stardust-NExT spacecraft sped past comet 9P/Tempel 1 at 11:39 p.m. Eastern Standard Time on Valentine's Day, and Tuesday afternoon, the science team unveiled images representing some of the flyby's greatest hits.
Among 72 pictures
taken during closest approach to the comet's potato-shaped nucleus, the
craft captured changes in the cometscape since it last was imaged by
NASA's Deep Impact craft six years ago.
The crater that mission's 800-pound projectile carved into the nucleus
- obscured by dust during the Deep Impact flyby - also swung into
Stardust-NExT's view. And the craft captured images of intriguing new
regions of the nucleus's surface.
"If you ask me: Was this mission 100 percent successful in
terms of the science? I would have to say: No," said an exuberant Joseph
Veverka, a Cornell University solar-system scientist and the mission's
lead researcher. "It was 1000 percent successful."
After a journey of 3.5 billion miles the craft passed 110 miles from the
nucleus, colliding with dust particles in the comet's halo, or coma.
The team converted the collision data into sound, yielding an audio
track reminiscent of hailstones intermittently pummeling a tin roof.
During a briefing Tuesday afternoon, the team unveiled the photos of
greatest interest - images taken during the flyby's closest approach
to the comet.
Among the initial observations:
- In 2005, Deep Impact captured a sharply scarped plateau-like feature
roughly two miles long and about 1,300 feet across. During this pass,
the plateau showed significant signs of erosion - material lost during
heating that liberated ices and gas during the comet's closest approach
to the sun.
The plateau is likely a downhill flow of dust triggered by an outburst
of gas at some point in the comet's past, Dr. Veverka says.
- The Deep Impact crater was barely discernible in the images the team
released. But Brown University's Pete Schultz, a member of the Deep
Impact and Stardust-NExT science teams, said the crater was readily
apparent in stereo images as well as in new shots of the nucleus with in
oblique sunlight.
The subdued crater is roughly 500 feet across and has a discernible
mound in the middle, evidence Dr. Shultz says, that much of the ejecta
the Deep Impact collision kicked up fell back onto the comet.
"The crater partly healed itself," he says.
- Views of never-seen-before features on portions of the comet Deep
Impact didn't image "are simply amazing," Veverka says. The surface
displays extensive layering, pits, and craters - clues he and his
colleagues will sort through to uncover the geological history of Tempel
1 and the forces beyond solar heating that shaped it.
- A dust analyzer uncovered evidence for carbon and carbon bound with
nitrogen - chemicals and chemical constructs that, in part, form the
scaffolding for biologically important molecules, noted Donald Brownlee,
another team member and a researcher at the University of Washington in
Seattle.
The dusty coma surrounding the comet is "a very dramatic environment,"
he said, in which material is released from the nucleus "in bursts and
puffs of clods and ice.
Stardust-NExT's initial objective when it launched in 1999 was to visit
comet Wild 2 and return dust samples to Earth that the craft collected.
The cost of the mission was on the order of $200 million.
But once it had dropped off its precious cargo - material that
scientists are still studying - in 2006, the craft was in perfect
health. At that point, Veverka proposed sending it back to visit Tempel 1
to follow up on Deep Impact's observations for an additional $29
million.
From all indications, the craft still is in great shape, notes Tim
Larsen, the Stardust-NExT project manager at NASA's Jet Propulsion
Laboratory in Pasadena., Calif. He says it will continue to take
pictures of the comet for another week or two as the distance between
the two grows.
Calgary, Canada: Streaking asteroid fireball sets Monday morning skyline alight
Space gave Canada a Valentine's Day rock on Monday when a piece of asteroid lit up the Calgary morning skyline.
Niel Beckie was travelling westbound on Glenmore Trail just under Crowchild Trail around 6: 55 a.m. when he saw a flash.
Beckie said he witnessed a very large blue-green fireball that broke into pieces before fading out.
"It lasted about five or six seconds," noted Beckie.
"It was unique and doesn't look like a fireworks. I was curious if anyone else had seen it."
Alan Hildebrand, Canadian Fireball Reporting Centre
co-ordinator and University of Calgary department of Geoscience
associate professor, said one person managed to catch the falling
asteroid on video.
"Unfortunately you need multiple camera recordings to triangulate where
it fell and lots of witnesses," explained Alan Hildebrand.
"It was so cloudy though, especially to the west of us."
Because of the cloud cover, Hildebrand said the space junk probably won't be found.
However, he added the rock probably landed about 300 or 400 kilometres
west of the city, either in Revelstoke or Kamloops, and was about 100
kilograms.
"Now how big is a 100 kilogram rock?" asked Hildebrand. "It would be the size of a pillow."
Hildebrand added if researchers could find the rock that hurtled through
the atmosphere at about 20 kilometres a second, they would be able to
figure out the orbit of the asteroid.
"When you're trying to sort out the asteroid zoo, it's a lot cheaper to
have a piece than going to an asteroid," said Hildebrand.
"It's certainly fun when we have enough information to proceed with an investigation."
lstorry@CalgaryHerald.Com
US: Giant fireball possibly a meteor sighted over East Coast
A fireball that streaked through the skies over East Coast which was
described by viewers as the size of a "Cesna plane" and one of "the
biggest, brightest, and most colorful ever!", could have been a passing
meteor.
FoxNews reported that the sighting occurred before 12:45 p.m ET. The
sighting was reported over New York, Pennsylvania, Connecticut and New
Jersey.
The numerous reports of the fireball sighting started during the
daytime, an unusual phenomenon as most of the meteor sightings are
reported during the night.
Philly.com quoted NASA scientist Bill Cooke of the Marshall Space Flight
Center as stating that the object seen might have been 5 feet in
diameter and would have weighed more than 5 metric tons, basing the
measurements on the reports of the brightness of the object. Cooke also
estimates that the object was traveling at a speed of 33,500 m.p.h.
Cooke further estimated that the fireball's energy was
equivalent to about 100 tons of TNT and was capable of producing a
crater 125 feet wide and 15 feet deep on impact.
The American Meteor Society's Fireball Sightings Log cites reactions of people who sighted the fireball around 12:45 EST.
Ken Ehleiter, Bentonville, AR described the sighting as "At first when I
seen it I thought it was a small Cessna plane flying over."
"Sharon," of Paramus, N.J.: "The speed at which it appeared and
disappeared was... remarkable. One second it was high in the sky and in
the next it was on the horizon. It was a ball of fire with a white
glowing train."
Diane Collins, of Tabernacle, N.J., said, "Having seen many "shooting
stars" in the past at... night, this sighting was impressive in the
brightness and size of the flash."
Brendan Davey, New York, N.Y., described the sighting as: "It fluxed all
the colors of the rainbow akin to an ... oil sheen on water. It was
moving at breakneck speed. It never made a sound and if you weren't
looking you wouldn't have known about it."
One witness said, "It was extremely bright. it seemed to be coming in at
a downward angle and to be completely honest I thought someone had shot
a missile at us but missiles are loud. There was no train left behind
and I mean absolutely nothing. I don't want to sound weird but it looked
magical."
US: Over the skies of Salem County and other parts of Northeast, a bright meteor seen in mid-day sky
It's a bird, it's a plane ... no it's a meteorite?
If you were lucky enough Monday, at around 12:45 p.m., you looked to the
skies over Salem County and saw a majestic, flaming fireball falling
through the atmosphere.
"So far we have 30 reports of a fireball moving in a general west to
east direction as seen from the northeastern United States," said
American Meteor Society official Robert Lunsford Monday afternoon.
"Daylight fireballs are rare and must be exceedingly bright to be
noticed with the sun in the sky."
One sighting happened right here in Salem County.
Woodstown resident Walt McGuniess called the Sunbeam and described the meteorite as it flew over top of Woodstown High School.
"I was out on a walk with my son and then I looked over top of Woodstown
High School and this huge meteor came hurdling through the sky," said
McGuniess. "It was spectacular, like a huge fireworks display."
Lunsford called it a random event.
"This was most likely a random event not associated with any
known meteor shower," said Lunsford. "This object was most likely the
size of a small car before striking the upper atmosphere (and beginning
to burn up)."
Lunsford said the fireball terminated over the Atlantic Ocean.
"There is no hope for recovering any possible debris," he said.
A Ridgefield Park man said he saw the fireball after glancing out a
window during a break from his work Monday. HL Devore works at
GalleryCollection.com in North Jersey.
"It was an amazing sight. I have never seen anything like it," said Devore. "There was a flash of light then a trail of smoke."
Devore took to the computer and as with most types of technology these days the word spread.
Descriptions of sightings exploded on the social networking websites
Twitter and Facebook. Posts came from people in New Jersey,
Philadelphia, Connecticut, New York and even Egypt.
US: Silver Streaks in the Sky Likely a Meteor
Residents from NJ, NY, CT and Pa. report streaks of silver in the sky
"A streak of silver and then a flash with crazy colors." That's how one
person on Twitter described the celestial phenomenon seen by thousands
of people across five states.
Around 12:30 p.m. Monday a fireball appeared in the sky over Pennsylvania, traveling east for hundreds of miles.
The Internet lit up with reports of sightings from people in Connecticut, New York, New Jersey, Pennsylvania and Maryland.
H.L. Devore says he was in his office in Ridgefield, N.J., looking out
of the window when he saw it and said to himself, "What the heck is
that."
Scientists say it most certainly was a large meteor, a piece of
an asteroid or a comet that falls through the earth's atmosphere.
This latest meteor, one scientist says, was probably the size of a car
and from its trajectory likely landed somewhere in the Atlantic Ocean.
Professor Jon Friedrich says while meteors fall to earth on a daily
basis, "It is unusual to see one so bright in the middle of the day."
Blast from the Past: Did mystery object cause Morpeth, UK rumble?
It
was just after 7pm on Tuesday, January 18, 1977, when houses were
shaken over a wide area of Northumberland by a mystery object. The
effect was felt as far apart as Stakeford, North Seaton, Morpeth, Ulgham
and Whalton.
People described how their homes were shaken violently, with
doors banging and windows rattling. The noise was compared to thunder by
some, while others said it sounded like snow falling off the roof, but
there was no snow on the roof.
Others said the noise sounded like bricks being dumped outside the
house. A policeman who lived near Morpeth Railway Station thought there
had been a train crash when he heard the noise.
However, a group of youngsters playing in the street at the police
houses at the Kylins, Morpeth, saw a mystery flying object glowing in
the sky. It was said to be a bright yellow ball and when it went bang,
it went over the area quite quickly.
As it sped off there a bright trail was seen behind it, but it
was not like an aircraft condensation trail. The children in the area
were so frightened, they ran into their homes to let their parents know
of the sighting.
Adults and children from other areas also saw the mystery object. One
man went out to look and saw what he thought was a large helicopter
south west of Morpeth.
The object was lit up by a yellow light and from where he was watching it appeared to be hovering.
The authorities looked into the matter and contacted the RAF, at its
early warning station at Boulmer, and Newcastle Airport, but neither had
picked up anything to account for the mystery object.
In June 1974 three Morpeth boys saw a mysterious light in the sky and also heard a strange noise.
They heard a high-pitched noise from the direction of Morpeth
Common as they walked up Swansfield, on the Kirkhill Estate. Then they
saw a bright light which started to move. On that occasion the light
moved over the Whalton Road and then south.
From time to time people in different parts of Northumberland have seen
unexplained lights in the sky. Astronomer Patrick Moore went on record
to say that mysterious objects could be meteorites. He said they are
heavenly bodies which burn away as they pass through the upper layers of
the earth's atmosphere.
Canada: Streaking Asteroid Fireball Sets Morning Skyline Alight Over Calgary
Space gave Canada a Valentine's Day rock on Monday when a piece of asteroid lit up the Calgary morning skyline.
Niel Beckie was travelling westbound on Glenmore Trail just under Crowchild Trail around 6: 55 a.m. when he saw a flash.
Beckie said he witnessed a very large blue-green fireball that broke into pieces before fading out.
"It lasted about five or six seconds," noted Beckie.
"It was unique and doesn't look like a fireworks. I was curious if anyone else had seen it."
Alan Hildebrand, Canadian Fireball Reporting Centre
co-ordinator and University of Calgary department of Geoscience
associate professor, said one person managed to catch the falling
asteroid on video.
"Unfortunately you need multiple camera recordings to triangulate where
it fell and lots of witnesses," explained Alan Hildebrand.
"It was so cloudy though, especially to the west of us."
Because of the cloud cover, Hildebrand said the space junk probably won't be found.
However, he added the rock probably landed about 300 or 400 kilometres
west of the city, either in Revelstoke or Kamloops, and was about 100
kilograms.
"Now how big is a 100 kilogram rock?" asked Hildebrand. "It would be the size of a pillow."
Hildebrand added if researchers could find the rock that hurtled through
the atmosphere at about 20 kilometres a second, they would be able to
figure out the orbit of the asteroid.
"When you're trying to sort out the asteroid zoo, it's a lot cheaper to
have a piece than going to an asteroid," said Hildebrand.
"It's certainly fun when we have enough information to proceed with an investigation."
A Thermal Airburst Impact Structure
Fri, 18 Feb 2011 10:20 CST
Dennis Cox
Mark Boslough's super computer generated, comet airburst simulation is a must see.
In it we see the exploding comet detonating high in the atmosphere, and
becoming a supersonic down draft of thermal impact plasma hotter than
the surface of the sun. But watch the sequence closely. And pay
particular attention to the post impact updraft at the center of the
flow. And to the directions of flow of the airburst vortex at the
surface, as the impact plume develops at the center of the vortex. You
might want to replay it a few times.
The old way of imagining of those things was to think of it as a point
explosion high in the atmosphere. And it's still popular in the press to
pretend the atmosphere dissipates the blast. As you can see, it
doesn't. Using super computers has allowed them to retain the downward
momentum. So we can see the impact vortex hit the ground as a supersonic
blast hotter than the surface of the sun. It would be naive to a fault
to think such energies can be dissipated without significant planetary
scarring, or ablative geomorphology.
And, in fact, in central Mexico, the recent marks of thermal
airburst down blasts are terribly common. Forensically speaking there
are thousands of square miles of pristine blast effected materials in
central Mexico that describe the fall of a super cluster of too many air
bursting fragments like the one Dr Boslough's simulation shows, and
even larger, to count.
I've chosen an ordinary-typical example of what a geo-ablative airburst
does when the fragment is among the last to fall in a super cluster
hundreds of miles wide, lat 29.702168 lon - 105.686617:
The white line in the image is 5 miles long.
The
mountain, and others like it, are the central uplift of an airburst
impact structure that is different from anything ever described before.
As you can see, the radial, outwards flowing ejecta curtain is almost
perfectly pristine, exposed on the surface. There is no question but
that the mountain is the source location of the materials in the ejecta
curtain. But the mountain consists of uplifted meta sedimentary strata.
It's not a volcanic vent, or rift. There is no crater here either.
The
picture begins to make since when we realize that the mountain, and its
pristine ejecta curtain is only a few thousand years old.
This
ejecta curtain of geo-ablative melt was blown outwards by the impact
down-blast. These are the patterns of movement you see when a fluid is
driven across a surface by high velocity atmospheric pressure like the
froth on a stormy beach.
The indication of the speed of the materials in the emplacement of the ejecta curtain is the outwards pointing chevrons.
The shocker here, is that the mountain did not exist in any form at all
at the moment of impact. To really understand the process that formed
the uplift, we need to look closely at the ablative patterns in its
outer surface.
In
the simulation, note the supersonic upwards flow in the center of post
impact vortices. The mountain was born almost in an instant as the
surface rebounded up into the impact vortex. So, at the same time the
material in the radial ejecta curtain was being ablated, and blown
outwards, the rebounding surface at the center was ablated, and pulled
up into the impact plume by the upwards flow at the center of the
vortex.
And
the signature of that ablative upwards flow is in the deep V shaped
excavations that are wider at the top, and center of the flow.
There
are well over 50,000 square miles of geo-ablative terrains like this in
central Mexico alone. And the region is unique on the surface of the
Earth. The Arid climate has preserved the blast effected materials in
context, and in perfect condition. Most of it is in almost the same
condition as it was the first year after the impact storm.
These kind of strange, and surreal geo-ablative terrains can also be
found in other parts of the world. But everywhere else on Earth the
geo-ablative ejecta has decomposed to become soils. And the patterns of
movement, and flow, in the emplacement event are no longer legible. So
the melt has become indistinguishable from ordinary volcanic tuff.
This is where the fledgling science of Fluid Mechanics comes into its
own, and takes flight. The ability to read the fluid emplacement motions
of all of the blast effected materials of such an event with such
confidence, and in such detail, makes it a kind of written language, or
choreographic dance chart.
The blast effected materials of the Mexican impact zone can be thought
of as a kind of cipher key, or 'Rosetta Stone', for learning to read the
empirically true, geo-history of the world from the rocks themselves.
And those truths can be tested.
Second Bright Fireball In Ten Days Observed Over Italy
Sat, 19 Feb 2011 08:21 CST
lunarmeteoritehunters.blogspot.com
Just ten days previously another bright fireball was recorded on the night of February 8th:
Bright Fireball Seen Over Italy
Fireball 2011.02.18_18.23.42 ± 1 U.T.
From the station Ferrara TLE Tracker (provisional azimuth: 33 v 16 °)
Full track (J2000)
RA: 212,480
Decl i: 53,430
AR f: 227,357
F decl: 45,525
Transit Duration: 4.24
Duration wake: 0.00
No fragmentation
Flares Number: 1
Max apparent magnitude: -5 ± 0.5
Zenithal magnitude: -9.5 ± 0.5
Meteor shower: SPO
Note: height fireball initial point 15 ° FH 4 °
Spectrum to first order: NO
Color camera: Yes
FOV and projection of the fireball as if it were a starting point and end point 90 km to 30 km.
U.S. Must Take Space Storm Threat Seriously, Experts Warn
Washington
- Space weather could pose serious problems here on Earth in the
coming years, the chief of the National Oceanic and Atmospheric
Administration (NOAA) said Saturday (Feb. 19).
A severe solar storm
has the potential to take down telecommunications and power grids, and
the country needs to work on being better prepared, said NOAA
administrator Jane Lubchenco here at the annual meeting of the American
Association for the Advancement of Science. Lubchenco is also the U.S.
Under Secretary of Commerce for Oceans and Atmosphere.
"This is not a matter of if, it's simply a matter of when and how big,"
Lubchenco said of the potential for a dangerous solar flare. "We have
every reason to expect we're going to be seeing more space weather in
the coming years, and it behooves us to be smart and be prepared."
Ramping Up
The space weather threat is becoming more dire as our sun ramps up
toward its period of solar maximum, predicted for around 2013. Activity
on the sun fluctuates on a roughly 11-year cycle, and our star has been
relatively dormant for a while.
That's clearly starting to change, though, as evidenced by a class X solar flare - the strongest kind - that erupted from the sun Feb. 14.
"I think the events of this week certainly underscore how important it
is for us to be paying attention to space weather and to be prepared to
respond to, and mitigate, potential impacts," Lubchenco said. "As we
enter into a period of enhanced solar activity it seems pretty clear
that we are going to be looking at the possibility of not only more
solar events but also the possibility of some very strong events."
The Feb. 14 flare unleashed a wave of charged particles that streamed
immediately toward Earth, as well as coronal mass ejections, or blobs of
plasma, that took days to arrive here. When they did, they interacted
with Earth's magnetic field to cause geomagnetic storms that wiped out
radio communications in the Western Pacific Ocean and parts of Asia, and
caused airlines to reroute some polar flights to avoid radio outages.
Next Time Could Be Worse
However, experts say we got off fairly lucky with this recent solar storm,
and that future eruptions could cause worse damage, particularly to the
sensitive transformers and capacitors in power grids. If some of these
were harmed, there could be power outages for days, weeks, months, or
even, in the case of severe damage, years, experts warned.
"It turned out that we were quite well protected this time, so not much
happened," said European Space Agency scientist Juha-Pekka Luntama. "In
another case things might have been different."
Space weather hasn't posed quite such a threat before, because during
the last solar maximum, around 10 years ago, the world wasn't as
dependent on satellite telecommunications, cell phones and global
positioning system (GPS) - all technologies that could be disrupted by
solar flares.
"Many things we take for granted today are so much more prone to the
effects of space weather than was the case during the last maximum,"
Lubchenco said. The problem is likely to get even worse as the world
could likely become more technologically dependent by the time the next
solar maximum rolls around, and the next.
Slightly Scary
Other experts agree that the risk must be addressed.
"It is slightly scary, and I think properly so," said John Beddington,
the U.K. government's chief scientific adviser. "We've got to be scared
by these events otherwise we will not take them seriously."
He and other European officials said the world needs greater international cooperation to meet the threat of dangerous space weather.
"There are few emergency scenarios today that require such close
cooperation across the Atlantic as a geomagnetic storm," said Helena
Lindberg, director general for the Swedish Civil Contingencies Agency
(MSB).
We have an "urgent need to start sharing expertise and connecting our
systems for warning and for response," Lindberg said. "This cooperation
has to be put in place before a disaster hits."
Despite the risk, though, some experts stressed that there's reason to be optimistic. There is work being done to improve our ability to forecast solar storms in advance, equip more satellites with radiation shielding and fortify power grids with resilient transformers and capacitors.
"Please don't panic," said Stephan Lechner of the Institute for the
Protection and Security of the Citizen at the European Commission's
Joint Research Centre. "Please don't leave the room and tell everybody
that space weather will kill us tomorrow."
US: Astronomers Investigating Meteor-Like Object Over Colorado
Denver - No one is exactly sure what it was, but many people saw it on Tuesday.
9NEWS started receiving reports of a bright light in the sky over
Colorado around 6 p.m. Tuesday. The description of what people saw and
the location in the sky varies, but it was seen be numerous people along
the Front Range.
Jenny Murphy described it on the 9NEWS Facebook page as "a meteor just
north of Lafayette! Reddish with a purple hue from my angle."
Kelly O'Hara Buccino said, "I saw it driving home, it looked like a fire
cracker... blue light with green sparkles... it was crazy!"
9NEWS has received reports that the object was possibly a
meteor or even a NASA rocket, but those reports cannot be confirmed at
this time.
Astronomers tell 9NEWS that a meteor shower was not expected Tuesday
evening. Stargazers are investigating, checking in with their networks
of telescopes in hopes of identifying the object.
If you have a picture of the object, you can send it to here.
Asteroid's Record-Breaking Brush with Earth Changed It Forever
A tiny asteroid that zipped by Earth this month made the
closest-ever approach to our planet without hitting it, an encounter
that changed its place in our solar system forever, NASA scientists say.
The asteroid, called 2011 CQ1, came within 3,400 miles (5,471
kilometers) of Earth on Feb. 4. Astronomers with NASA's Near-Earth
Object office now say the flyby set a record for a space rock.
"This object, only about 1 meter in diameter, is the closest
non-impacting object in our asteroid catalog to date," wrote astronomers
Don Yeomans and Paul Chodas in a post-flyby analysis. Both scientists
work in the NEO office, at NASA's Jet Propulsion Laboratory in Pasadena,
Calif.
Asteroid 2011 CQ1
was discovered only 14 hours before its close approach, which occurred
over the mid-Pacific Ocean, but it never posed a threat to the planet
because of its small size: 4 feet (1.3 meters) wide. Had it entered
Earth's atmosphere, it would have broken apart before reaching the
ground, NASA scientists said.
Record-setting asteroid encounter
The asteroid's flyby of Earth has changed its orbit, according to Yeomans and Chodas.
Before its Earth encounter, asteroid 2011 CQ1 was one of the solar
system's so-called Apollo-class asteroids, whose orbits around the sun
are mostly outside the orbit of Earth.
But during the Feb. 4 flyby, Earth's gravitational pull warped the
flight path of 2011 CQ1. Now the asteroid will spend "almost all of its
time inside the Earth's orbit" in what scientists call an Aten-class
orbit, explained Yeomans and Chodas.
The Earth's gravity pulled asteroid 2011 CQ1 about 60 degrees off its original flight path, they added.
February's asteroid flybys
Asteroid 2011 CQ1 was the first of two asteroids to zip past Earth within a span of six days. Another space rock - the car-size asteroid 2011 CA7 - came within 64,300 miles (103,480 km) of Earth when it passed by on Feb. 9.
Astronomer Richard A. Kowalski of the Catalina Sky Survey discovered
asteroid 2011 CQ1 just before its flyby, and scientists at Remanzacco
Observatory in Italy snapped a photo of the object ahead of the close
pass.
NASA and other scientists monitor the skies for asteroids or comets with
orbits that cross that of the Earth in order to track near-Earth
objects that could pose an impact threat to our planet. Tiny asteroids
like 2011 CQ1 are difficult to spot but pose no threat to Earth.
"There is likely to be nearly a billion objects of this size and larger
in near-Earth space, and one would expect one to strike Earth's
atmosphere every few weeks on average," Yeomans and Chodas wrote. "Upon
striking the atmosphere, small objects of this size create visually
impressive fireball events but only rarely do even a few small fragments
reach the ground."
US: Sightings of a Fireball Streaking Across Southern California
Did
you see it? (We didn't. The photo is from the Getty archives. We were
at the Encino Neighborhood Council meeting when this happened.)
Local residents have been reporting a bright, white streak in the sky
that lasted no more than five seconds. Here are a few of the described
sightings sent to our e-mail and posted to the American Meteor Society's Fireball Sighting Log:
"I was driving south on the 405 Freeway around 8:10 p.m. I saw a white
streak of light and then a reddish-orange flameout of some sort of
meteor. This all lasted about 3 seconds. It was traveling north to south
and was on the right (West Side) of the freeway. When I saw it the
light, it was just visible over the hill where the homes are on the top
of the hill at Mountain Gate. Checking the Internet, see here, other people had seen this streak of light and reported it." - Michael Martin, Sherman Oaks, to Encino Patch.
"I was driving southbound on I-110 at approximately 60-65 mph. I
first saw it in the sky above the trees just south of the I-110 I-105
interchange. It then descended into the trees straight down. It's was a
bright white, slightly tinted ball of light. I was tracking it while
driving. I noted that it was before the El Segundo exit and west of the
freeway. It wasn't descending really fast." - Rex Tjoa, Los Angeles, to
American Meteor Society
"It was moving much slower than a shooting star and going straight down,
it appeared to me. It was bigger than any planet or star in our galaxy
that I've seen. About two-thirds of the way through its "flight" (or at
least the portion I saw), it burst into flames. Serious yellow flames
trailing behind it. I can't be positive but I thought the flames burned
out and then I saw more of the meteor (just a white ball) afterward. Of
course, "it all happened so fast." But it was definitely the most
amazing astronomical event I've ever seen. And as a 52-year-old,
well-educated woman, I've seen enough to know this can't compare to
anything else. I was just 50 feet down the street from my house and I
came bursting in the door shouting, "Where do I report a meteor?" That's
how amazing it was." - Cherie Phoenix, Thousand Oaks, to AMS
Meteorites Illuminate Mystery of Chromium in Earth's Core
It's generally assumed that the Earth's overall composition is
similar to that of chondritic meteorites, the primitive,
undifferentiated building blocks of the solar system. But a new study in
Science Express led by Frederic Moynier, of the University of California at Davis, seems to suggest that Earth is a bit of an oddball.
Moynier and his colleagues analyzed the isotope signature of chromium in
a variety of meteorites, and found that it differed from chromium's
signature in the mantle.
"We show through high-precision measurements of Cr stable isotopes
in a range of meteorites, which deviate by up to ~0.4‰ from the bulk
silicate Earth, that Cr depletion resulted from its partitioning into
Earth's core with a preferential enrichment in light isotopes," the
authors write. "Ab-initio calculations suggest that the isotopic
signature was established at mid-mantle magma ocean depth as Earth
accreted planetary embryos and progressively became more oxidized."
The results point to a process known as "core partitioning," rather
than an alternative process involving the volatilization of certain
chromium isotopes so that they would have escaped from the Earth's
mantle. Core partitioning took place early on Earth at high
temperatures, when the core separated from the silicate earth, leaving
the core with a distinct composition that is enriched with lighter
chromium isotopes, notes William McDonough, from the University of
Maryland at College Park, in an accompanying Perspective piece.
McDonough writes that chromium, Earth's 10th most abundant element, is
named for the Greek word for color and "adds green to emeralds, red to
rubies, brilliance to plated metals, and corrosion-proof quality to
stainless steels." It is distributed roughly equally throughout the
planet.
He says the new result "adds another investigative tool for
understanding and documenting past and present planetary processes. For
the cosmochemistry and meteoritics communities, the findings further
bolster the view that the solar nebula was a heterogeneous mixture of
different components."
Source: Science. The McDonough paper will be published online today by the journal Science, at the Science Express website.
Flashback:
Major Impact Soon: British MP says, "We're living in a bowling alley"
Mon, 31 Jan 2005 14:26 CST
Stuart Miller
Phenomena Magazine
I
hope you will excuse my cynicism but there is something quite
remarkable about this interview with Lembit Opik, the Liberal Democrat
Member of Parliament for Montgomeryshire. You will not find one single
trace of political gobbledegook or point scoring.
What you will find are the thoughts and feelings of an individual who
passionately believes in what he is trying to achieve. This is a brave
man carrying a message that no one wants to hear and he is prepared to
take the brickbats and mocking that inevitably accompany such a message.
What other tribute could I possibly offer, aside from accusing him of
also being a very warm, approachable human being, other than to say that
I only wish he was my Lembit Opik MP...
Lembit is the leading voice in the UK on asteroids and the little matter
of one of them smacking into us, probably sooner rather than later. And
one of those bits of rock doesn't have to be particularly large in
order to cause immense devastation and loss of life. Or rather, let me
put it this way. If on Christmas day last year I had told you that a
giant wave would sweep across south East Asia, hit land and cause the
loss of 220,000 lives (so far), you would not have believed me. There's
no argument - you wouldn't have believed me. The next day it happened.
We need to wake up rapidly and do something.
SM: You are very well known for your interest in near earth objects. How long has it been a subject of interest to you?
LO: 33 years.
SM: Is this as a result of your grandfather?
LO: I would say that I started taking a
very significant interest in meteors, comets and so forth when I was
about 6 because, as you said, directly as a result of the influence of
my grandfather. So I was reading astronomy books when most people were
reading "Janet and John". That was probably the very early 1970s and I
actually converted that into a practical interest in the sense of doing
something about it in 1998 when I first raised it in the Houses of
Parliament.
SM: Was it that Horizon programme that triggered your interest?
LO: The practical trigger to action was a
chance meeting with a man called J. Tate who is Director of Spacegaurd
UK, at a meeting of the Shropshire Astronomical Society. He was making a
presentation about Spacegaurd's work and was explaining that the odds
were stacked in favour of an impact and he went on to describe the
colossal damage that these objects would do.
He explained furthermore that there was something we could do to prevent
them by tracking them and finding ways to divert or to prevent an
impact from occurring if we had enough notice.
That was in 1998 and at that point I spoke with J and since the science
was absolutely cast iron, we had the evidence to turn this into a
political matter of investment by the Government and I got my
adjournment debate in March 1999. But it was the meeting with J. Tate
that finally kicked me into political action.
Then I really decided to carry on in the political sphere, as my
grandfather had done in the astronomical sphere. He spoke about the
threat and danger of impact long before it was fashionable to do so,
even in the astronomical world in the 1950s for example.
The Horizon programme was about the Chicxulub impact which
wiped out the dinosaurs, probably, and it was fortuitous timing because
it came out at just about the time I was trying to get this issue on to
the political map. I like to think there are some other programmes that
have been prompted by the campaign that we have run because everyone now
knows about asteroid impacts and I'm not so sure that would have
happened had we not turned it into a political issue.
SM: I would imagine that you find the whole process of dealing with the UK government on this subject incredibly frustrating.
LO: It is, it's very difficult to get the
British Government to act on it and I can understand why. On the face of
it, this sounds like cranky science fiction. It sounds like a case of
an Ed Wood 1950s B movie. That's because the idea of a catastrophic impact by a celestial body has not got any bearing on recent Human experience. There
are maybe echoes of previous impacts in the cultural legends of the
Human race but there hasn't been a catastrophic impact leading to a
major loss of life in recent times.
So, since politics lives in the present and the future more than in the
past, it's not surprising that politicians have said, "Well, this seems
too small of a risk for us to take seriously."
SM: Do you think that one of the positive
benefits, if one can use such a phrase in relation to the tsunami in
south East Asia is that Mankind is vulnerable to major natural disasters
and do you think there is a chance that this might actually wake some
people up?
LO: Yes, I agree. I'm pretty sure that the
tsunami has been something of a geological wake up call to World
governments and until last Christmas, December 26th 2004, the word
"tsunami" sounded like a foreign phrase. Now it sounds like a
catastrophe. It's just reminded a lot of people about the power of
nature and crucially, it's caused people to make the calculation about
prevention versus cure. It's perfectly obvious that the benefit of
prevention of loss of life would have far exceeded the cost of having an
early warning system. Exactly the same applies to asteroids. What I
worry about is this; do we have to have a significant impact before
people think, "Oh, we need to have an early warning system after all"
which is exactly what has happened with the tsunami.
To the British Government's credit, they did take my advice and
commissioned a Near Earth Object task group to look into the danger and
to report back. The task group, not surprisingly, confirmed everything
I'd been claiming. For example, the statistic which has chilled many
people is that you are 750 times more likely to die as a result of an
asteroid impact than you are to win the National Lottery. Suddenly the
statistics have come into the grasp of the general public. Some people
do win the National Lottery! To use the National Lottery phrase, "It
could happen to you".
So we're winning the public debate but the government, having
commissioned a report and having received a list of 14 recommendations
for action, have only actually acted on a tiny number of them. I think
there's maybe one that's been completed, a couple are work in progress
and some haven't been touched at all.
SM: Obviously the 14 recommendations
involve expenditure. Is there this feeling that the government aren't
bothered because NASA has supposedly got it covered?
LO: To an extent I think the British would
like to leave it to the Americans but I think there's a bigger problem
here, and it's this. The government subconsciously make their
calculation that even if their own task group recommends 14 action
steps, they themselves don't need to carry them out because somehow,
psychologically, they still feel far away from the danger and the
problem.
But I also think there's a political fear here in that if they invest
money on a tracking programme they will get criticised by opposition
parties for wasting tax payer's money on a Mickey Mouse - Flash Gordon
project.
SM: So there's still a problem about being taken seriously?
LO: I think there is because there are contradictions in how the government approaches risk. They're
willing to impose all kinds of incredibly strict regulations on farming
to try and eliminate miniscule health dangers but they stand by doing
very little about a potentially Armageddon type impact which in
actuarial terms stands to kill far more people than CJD, BSE, food
poisoning and phosphates put together. Therefore it's not joined up thinking about risk management, which is causing the problem.
SM: Do you attach any responsibility or blame if I can use that word to Lord Sainsbury for this?
LO: I don't actually in the sense that
Lord Sainsbury has been more pro-active than just about anybody else in
government. He took the risk of commissioning the report, admittedly on
my advice but he was the guy in the front line. He also has met on a
number of occasions with me and others to consider the issue. And in
fairness, he has caused the release of significant amounts of money to
the British National Space Centre to provide an information service to
the general public about this issue.
So, while I would like Lord Sainsbury to pro-actively lobby the Prime
Minister to raise this as part of the next G8 agenda, I don't hold him
responsible for inaction because had it not been for his willingness to
take a risk personally, we wouldn't have got this far.
So actually I think he's one of the heroes of the piece. I think a fear
of falling is the greatest culprit. There's a mixed up risk management
strategy by this government. They are willing to
commit us to a questionable war in Iraq but they're resistant to making a
small investment with the other G8 countries on a dead certified Earth
threatening risk.
SM: It's weird logic.
LO: It is. We're off to fight a war in Iraq on the basis of imaginary weapons of mass destruction. They're
willing to do nothing in the face of a guaranteed weapon of mass
destruction which already has Earth's name written all over it and which
we haven't yet identified.
SM: Is there any consensus at the moment about the best way of dealing with an asteroid that's hurtling towards us?
LO: No. There are various options from a
nuclear detonation to using a rocket as a tug, to encasing the object in
a big cosmic bin bag and towing it out of harms way. There are two
problems. We don't know for sure what these things are made of and Deep
Impact will help us a lot in our understanding of what comets are like
and whether they are one single, solid object or whether they are like
an ashtray held together by very week gravity. We need to know the
answer to that before we can be sure what to do.
Secondly, there hasn't been enough work done on deflection processes but
ironically, one of the best lines of approach of investigation is the
American Star Wars programme, from which Deep Impact itself was spawned.
SM: That's a very weird programme. There are all sorts of theories that have been spawned about that.
LO: The principle is the same because in
both cases one is trying to intercept a small very fast moving object
from a great distance and one needs a very high degree of reliability in
achieving that kind of contact. Interestingly, although there
are many flaws in the "Armageddon" and "Deep Impact" films, at the very,
very most basic level the general idea was right. You have to intercept
and divert these objects.
SM: How deeply involved are you with Spaceguard?
LO: You're probably best to ask Spaceguard
that but I feel closely connected to the key players and I feel they
have helped me in this campaign more than I can say in words. Had it not
been for J. Tate, I would probably not have raised it in Parliament and
furthermore, had it not been for J. Tate's continuing, ceaseless
efforts to keep this on the political map, together with the likes of
Mark Bailey from Armagh Observatory, Bill Napier from there and a number
of other people from around the country, then this subject would go off
the radar. It's thanks to them it's on the radar and in many ways I
regard myself as their political servant to raise it in those circles
when I can, when they feel it's appropriate for me to do so or when the
opportunities arise.
In terms of my own commitment, I want to see this to a conclusion. I
define success as whenever I get the British Government to agree an
accord with the other seven G8 countries to invest perhaps a million
pounds a year each in a tracking programme, which should track nine
tenths of the objects that could potentially threaten the Earth.
As the campaign began, Spaceguard, by coincidence, moved to a location
about 12 miles from my constituency. They're based at the observatory at
Knighton.
SM: Have you ever been laughed at or mocked for your views?
LO: Oh yes. When I first started, an
unusually large number of people turned up for the original debate
because they thought I was writing a cosmic suicide note on my political
career. And there was sniggering and laughing, and I made it worse by
starting with the phrase, "Mr. Deputy Speaker, I've got a problem with
asteroids". Of course, every Smart Alec in Britain decided to send me
some kind of ointment.
By the end of the speech, when I'd explained that the dinosaurs
were probably wiped out by an asteroid and that the earth had suffered
cataclysmic events many times in its past, that the Earth had indeed
been created by a series of bombardments from space in the early days of
the solar system and that the moon itself was the result of an earth
sterilising and melting event about 3,900 million years ago, when I told
them about the fact that the Earth is continually hit by fifty thousand
tons of space debris every year and that the most recent time an object
large enough to incinerate London hit the Earth on 30th June 1908, they
weren't laughing at the end of it.
I went into this knowing that it would be a hard sell and that people
would laugh, but so sure have I been of the science that I knew that the
facts would run out in the end, and that is exactly what has come to
pass.
SM: Given that the British government is
dragging its feet on this at the moment, what advice would you give to
members of the public who are concerned about this subject in terms of
what they can do?
LO: My request is always the same, and
it's this; please, please, please write to your member of parliament and
ask them in your own words to get the government to take action on
this, and request a reply to your letter. Sometimes they will ask me
about it, MPs from all parties come and ask me about it and that's fine
because I can provide them with the kind of information they need to see
that this is science fact, not science fiction.
But more than anything, if MPs are getting letters from their
constituents, then they'll understand this is an issue on the political
radar. And the more letters they get, the more likely it is that they
will act. That's all I ask. It would just help me so much, that people
who are concerned about this put pen to paper and send their letters of
concern to their MPs. I can do the rest then.
I'm absolutely sure there is going to be a significant impact at some point in the next few years. There just is.
SM: One frustrating thing is that NASA scientists are constantly being criticised for crying wolf.
LO: That's true but I must be honest and
say that it's in our interests to have these claims that objects are
coming close because it raises the ante. Sometimes these objects
are leaving the Earth's environment before we even spot them. There was
one 300 metre object that actually travelled between the moon and the
Earth. Now had that hit us that would have incinerated Asia or
Europe. And that's the problem. We're living in a ten pin bowling alley
where these things are the balls and we're one of the pins.
So I don't mind a little bit of sensationalism because frankly, no
measure of media sensationalism would really prepare people for the
calamity of an impact. J. Tate isn't so keen on that, he thinks the
sensationalism isn't so good but, from a political point of view, it
helps because it keeps the subject in front of the public. The politics
of fear sent men to the moon. It's a sad thing. I'd love there to be a positive dynamic here but frankly if it's fear we have too use, so be it.
Comment: Did you notice the politician's
surprise that an asteroid "actually travelled between the moon and the
Earth" early in the last decade?
That has happened multiple times since then. Just three weeks ago
a rock came as close to Earth as it could have done being pulled into
our atmosphere; the planet's gravity instead changed the rock's
direction by nearly 90 degrees.
It is highly unlikely that world leaders at the highest level are not
aware of the threat of a meteorite impact. We have been suggesting that
they ARE aware, and have been for a very long time. The reader might
wish to peruse Laura Knight-Jadczyk's Comets and Catastrophe series.
They are also aware that they cannot do anything to prevent impacts
such as those described in the above article. And so, they marginalize
the subject and feign disinterest all the while they are making their
own preparations to survive.
There is much evidence to strongly suggest that much of the landmass of Western Europe was destroyed in an meteorite impact
around 540 AD, ushering in what is known today as "the dark ages".
Further evidence from the study of fossilised tree rings and ice core
samples, not to mention historical records, suggests that this most
recent event was but one of many events that have happened in a cyclical
pattern throughout the course of human history.
As far as we know, no human has ever got out of this place "alive".
Perhaps now that the Universe, by posing a clear and present danger to
our very existence, is drawing attention to that existence, we might all
begin, even at this late hour, to ponder just what the real meaning of
our lives, individually and collectively, really is.
Comet Spiral Russia February 26, 2011
Top Ten Meteor Video Captures
Thu, 06 Jan 2011 12:08 CST
Nortonroad
Fires from beneath, and meteors from above,
Portentous, unexampled, unexplained,
Have kindled beacons in the skies; and the old
And crazy earth has had her shaking fits
More frequent, and foregone her usual rest.
Is it a time to wrangle, when the props
And pillars of our planet seem to fail,
And nature, with a dim and sickly eye,
To wait the close of all?
~ 'The Time-Piece,' Task, Book ii, lines 58-66. William Cowper
Portentous, unexampled, unexplained,
Have kindled beacons in the skies; and the old
And crazy earth has had her shaking fits
More frequent, and foregone her usual rest.
Is it a time to wrangle, when the props
And pillars of our planet seem to fail,
And nature, with a dim and sickly eye,
To wait the close of all?
~ 'The Time-Piece,' Task, Book ii, lines 58-66. William Cowper
Just another asteroid hurtling toward Earth ...
Hollywood hype aside, close encounters of a rocky kind are fairly
common. But they're fascinating to local scientists who want to learn
how it all began, and maybe fend off armageddon.
At
4:33 a.m. on a recent Friday, Timothy Spahr was startled awake by a
beep from his cellphone: A text message alerted him that a rocky object
was hurtling toward Earth. He told his wife it was "some asteroid
thing'' and went to check his computer.
In Hollywood, this would be the opening scene to a doomsday movie. But
for Spahr, director of the Minor Planet Center at the
Harvard-Smithsonian Center for Astrophysics, it is just another day.
About once a month, an object on a potential crash course with Earth
disturbs his slumber.
They almost always miss - and this time was no different. The asteroid
was just a few feet across and on track to miss by about 11,000 miles.
He sent a note to contacts at NASA and posted information about it
online.
People have long been fascinated by the threat of apocalypse by asteroid, as depicted in movies such as the 1998 film Armageddon and 1979's Meteor, which was inspired by an MIT student project to create a plan to avoid a theoretical collision.
The screenplays are fictional, and the threat is improbable.
Still, a small group of local scientists catalogs and tracks
"near-Earth objects'' - asteroids and comets - that could be
hazardous. Astronomers are intensely interested in these rocks and ice
flying by for basic scientific reasons, too - to learn about the
origins of our solar system.
Asteroids are essentially ancient chunks of scrap orbiting the sun -
un assembled building blocks that never mashed together to form planets.
(A meteor is the light created when a small object enters the
atmosphere.) They have become of such interest that President Obama
announced a plan last year to land astronauts on one by 2025 as a way of
pushing manned spaceflight to unexplored scientific targets that are
farther away than the moon.
"We can understand better what are the conditions . . . what were the
basic ingredients that built the planets,'' said Richard Binzel, a
professor at the Massachusetts Institute of Technology who studies what
asteroids are made of - and which ones might be scientifically
interesting destinations. "But the even more exciting question is, what
were the raw ingredients that allowed life to come about on Earth
itself?''
To answer those basic questions, scientists are learning as much as they
can from ground observations. On a Sunday morning earlier this month,
postdoctoral researcher Francesca DeMeo directed the movements of a
telescope atop Mauna Kea in Hawaii from an MIT lab hung with festive
foam meteorites. She talked with a telescope operator over a live video
link and took measurements that will help her better understand the
diverse makeup of asteroids, which can range from light chunks of carbon
to solid iron.
In a Cambridge office park about five miles away, Spahr called his team
the "nerve center'' for all observations of near-Earth objects,
collecting sightings from telescopes around the world that arrive by
e-mail. The Minor Planet Center, funded by NASA, receives up to 50,000
observations a day - some of nearby asteroids, but many that turn out
to be in the main asteroid belt between Jupiter and Mars.
Often, these are repeated sightings of the same object - measurements
that allow scientists to more precisely calculate its projected path.
Those are shared with NASA, which calculates asteroid trajectories for
the next century.
Other researchers, at MIT's Lincoln Laboratory in Lexington, hunt
asteroids utilizing techniques initially developed to help the Air Force
detect satellites.
The Earth and the moon are pocked with the craters of long-ago
collisions, but Binzel, a member of the Ad Hoc Task Force on Planetary
Defense, a NASA advisory council, noted that asteroids were not always a
topic of much scientific interest. He wrote his first paper on
asteroids as a teenager in 1974, using a backyard telescope. Then, they
were the "vermin of the sky,'' he said - drawing astronomers'
annoyance because of the blurry streaks they left on long-exposure
pictures of the night sky.
Gradually, interest in the area grew. In the late 1980s, scientists
proposed that a giant asteroid or comet impact killed off the dinosaurs.
In 1994 fragments of the comet Shoemaker-Levy 9 slammed into Jupiter.
"That was a wake-up call,'' said Grant Stokes, head of the aerospace
division at Lincoln Laboratory, which searches for asteroids and comets
through its LINEAR program. "It was kind of a reminder that in our
lifetime in our solar system, one of our neighbors does get hit by
things that are pretty big.''
Now, there are congressional mandates to catalog potentially dangerous
near-Earth asteroids, and there are committees that mull over what to do
if a threat is discovered.
Most asteroids sit in the main asteroid belt. But others are in orbits
that come close to Earth, and every day the planet's atmosphere is
pelted with small stuff, from 1,000 tons of dust a day to car-size
objects about once a year. Most vaporize in the atmosphere, but
occasionally one hits the ground. In October 2008, Spahr alerted NASA
that a very small object would strike Sudan within 21 hours. It exploded
in the atmosphere above the desert - where and when he predicted.
Congress has directed scientists to find 90 percent of the near-Earth
objects more than two-thirds of a mile in diameter, big enough to affect
the global climate if they hit. As of the end of January, 822 of the
estimated 1,000 nearby asteroids in that size range had been discovered.
Scientists have also been tasked with finding 90 percent of those that
are more than 460 feet in diameter, which could cause major regional
damage.
"If we find them 10 to 20 years in advance of a threatening encounter,
we can do something about them - run a spacecraft into them to slow
them down so in 10 to 20 years they miss the Earth,'' said Donald
Yeomans, head of NASA's Near-Earth Object Program Office.
Such sci-fi ideas spark the imagination, but everyone who works in the
field says you are far more likely to die driving home from work than
from an asteroid impact.
Comment: We really hate to burst Yeomans'
unrealistically optimistic bubble, but the chances of experiencing
potentially harmful to human life impact increase with each passing day.
Unfortunately, we don't have 10 to 20 years of prior warning anymore.
Let's hope that we will have more than 4 seconds.
"We have one of these problems I call a zero times infinity problem,''
said Irwin Shapiro, a Harvard professor who chaired a National Research
Council committee on near-Earth objects and hazard mitigation
strategies. "Something is very unlikely to happen, but if it were to
happen it would be extraordinarily important.''
Carolyn Y. Johnson can be reached at cjohnson@globe.com.
Hollywood hype aside, close encounters of a rocky kind are fairly
common. But they're fascinating to local scientists who want to learn
how it all began, and maybe fend off armageddon.
At
4:33 a.m. on a recent Friday, Timothy Spahr was startled awake by a
beep from his cellphone: A text message alerted him that a rocky object
was hurtling toward Earth. He told his wife it was "some asteroid
thing'' and went to check his computer.
In Hollywood, this would be the opening scene to a doomsday movie. But
for Spahr, director of the Minor Planet Center at the
Harvard-Smithsonian Center for Astrophysics, it is just another day.
About once a month, an object on a potential crash course with Earth
disturbs his slumber.
They almost always miss - and this time was no different. The asteroid
was just a few feet across and on track to miss by about 11,000 miles.
He sent a note to contacts at NASA and posted information about it
online.
People have long been fascinated by the threat of apocalypse by asteroid, as depicted in movies such as the 1998 film Armageddon and 1979's Meteor, which was inspired by an MIT student project to create a plan to avoid a theoretical collision.
The screenplays are fictional, and the threat is improbable.
Still, a small group of local scientists catalogs and tracks
"near-Earth objects'' - asteroids and comets - that could be
hazardous. Astronomers are intensely interested in these rocks and ice
flying by for basic scientific reasons, too - to learn about the
origins of our solar system.
Asteroids are essentially ancient chunks of scrap orbiting the sun -
un assembled building blocks that never mashed together to form planets.
(A meteor is the light created when a small object enters the
atmosphere.) They have become of such interest that President Obama
announced a plan last year to land astronauts on one by 2025 as a way of
pushing manned spaceflight to unexplored scientific targets that are
farther away than the moon.
"We can understand better what are the conditions . . . what were the
basic ingredients that built the planets,'' said Richard Binzel, a
professor at the Massachusetts Institute of Technology who studies what
asteroids are made of - and which ones might be scientifically
interesting destinations. "But the even more exciting question is, what
were the raw ingredients that allowed life to come about on Earth
itself?''
To answer those basic questions, scientists are learning as much as they
can from ground observations. On a Sunday morning earlier this month,
postdoctoral researcher Francesca DeMeo directed the movements of a
telescope atop Mauna Kea in Hawaii from an MIT lab hung with festive
foam meteorites. She talked with a telescope operator over a live video
link and took measurements that will help her better understand the
diverse makeup of asteroids, which can range from light chunks of carbon
to solid iron.
In a Cambridge office park about five miles away, Spahr called his team
the "nerve center'' for all observations of near-Earth objects,
collecting sightings from telescopes around the world that arrive by
e-mail. The Minor Planet Center, funded by NASA, receives up to 50,000
observations a day - some of nearby asteroids, but many that turn out
to be in the main asteroid belt between Jupiter and Mars.
Often, these are repeated sightings of the same object - measurements
that allow scientists to more precisely calculate its projected path.
Those are shared with NASA, which calculates asteroid trajectories for
the next century.
Other researchers, at MIT's Lincoln Laboratory in Lexington, hunt
asteroids utilizing techniques initially developed to help the Air Force
detect satellites.
The Earth and the moon are pocked with the craters of long-ago
collisions, but Binzel, a member of the Ad Hoc Task Force on Planetary
Defense, a NASA advisory council, noted that asteroids were not always a
topic of much scientific interest. He wrote his first paper on
asteroids as a teenager in 1974, using a backyard telescope. Then, they
were the "vermin of the sky,'' he said - drawing astronomers'
annoyance because of the blurry streaks they left on long-exposure
pictures of the night sky.
Gradually, interest in the area grew. In the late 1980s, scientists
proposed that a giant asteroid or comet impact killed off the dinosaurs.
In 1994 fragments of the comet Shoemaker-Levy 9 slammed into Jupiter.
"That was a wake-up call,'' said Grant Stokes, head of the aerospace
division at Lincoln Laboratory, which searches for asteroids and comets
through its LINEAR program. "It was kind of a reminder that in our
lifetime in our solar system, one of our neighbors does get hit by
things that are pretty big.''
Now, there are congressional mandates to catalog potentially dangerous
near-Earth asteroids, and there are committees that mull over what to do
if a threat is discovered.
Most asteroids sit in the main asteroid belt. But others are in orbits
that come close to Earth, and every day the planet's atmosphere is
pelted with small stuff, from 1,000 tons of dust a day to car-size
objects about once a year. Most vaporize in the atmosphere, but
occasionally one hits the ground. In October 2008, Spahr alerted NASA
that a very small object would strike Sudan within 21 hours. It exploded
in the atmosphere above the desert - where and when he predicted.
Congress has directed scientists to find 90 percent of the near-Earth
objects more than two-thirds of a mile in diameter, big enough to affect
the global climate if they hit. As of the end of January, 822 of the
estimated 1,000 nearby asteroids in that size range had been discovered.
Scientists have also been tasked with finding 90 percent of those that
are more than 460 feet in diameter, which could cause major regional
damage.
"If we find them 10 to 20 years in advance of a threatening encounter,
we can do something about them - run a spacecraft into them to slow
them down so in 10 to 20 years they miss the Earth,'' said Donald
Yeomans, head of NASA's Near-Earth Object Program Office.
Such sci-fi ideas spark the imagination, but everyone who works in the
field says you are far more likely to die driving home from work than
from an asteroid impact.
Comment: We really hate to burst Yeomans'
unrealistically optimistic bubble, but the chances of experiencing
potentially harmful to human life impact increase with each passing day.
Unfortunately, we don't have 10 to 20 years of prior warning anymore.
Let's hope that we will have more than 4 seconds.
"We have one of these problems I call a zero times infinity problem,''
said Irwin Shapiro, a Harvard professor who chaired a National Research
Council committee on near-Earth objects and hazard mitigation
strategies. "Something is very unlikely to happen, but if it were to
happen it would be extraordinarily important.''
Carolyn Y. Johnson can be reached at cjohnson@globe.com.
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