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Spitzer detects comet storm in nearby solar system
http://www.physorg.com ^ | 20 OCT 2011 | Provided by JPL/NASA

Posted on 10/21/2011 1:06:50 PM PDT by Red Badger

NASA's Spitzer Space Telescope has detected signs of icy bodies raining down in an alien solar system. The downpour resembles our own solar system several billion years ago during a period known as the "Late Heavy Bombardment," which may have brought water and other life-forming ingredients to Earth.

During this epoch, comets and other frosty objects that were flung from the outer solar system pummeled the inner planets. The barrage scarred our moon and produced large amounts of dust.

Now Spitzer has spotted a band of dust around a nearby bright star in the northern sky called Eta Corvi that strongly matches the contents of an obliterated giant comet. This dust is located close enough to Eta Corvi that Earth-like worlds could exist, suggesting a collision took place between a planet and one or more comets. The Eta Corvi system is approximately one billion years old, which researchers think is about the right age for such a hailstorm.

"We believe we have direct evidence for an ongoing Late Heavy Bombardment in the nearby star system Eta Corvi, occurring about the same time as in our solar system," said Carey Lisse, senior research scientist at the Johns Hopkins University Applied Physics Laboratory in Laurel, Md., and lead author of a paper detailing the findings. The findings will be published in the Astrophysical Journal. Lisse presented the results at the Signposts of Planets meeting at NASA's Goddard Space Flight Center in Greenbelt, Md., today, Oct. 19.

Astronomers used Spitzer's infrared detectors to analyze the light coming from the dust around Eta Corvi. Certain chemical fingerprints were observed, including water ice, organics and rock, which indicate a giant comet source.

The light signature emitted by the dust around Eta Corvi also resembles the Almahata Sitta meteorite, which fell to Earth in fragments across Sudan in 2008. The similarities between the meteorite and the object obliterated in Eta Corvi imply a common birthplace in their respective solar systems.

A second, more massive ring of colder dust located at the far edge of the Eta Corvi system seems like the proper environment for a reservoir of cometary bodies. This bright ring, discovered in 2005, looms at about 150 times the distance from Eta Corvi as the Earth is from the sun. Our solar system has a similar region, known as the Kuiper Belt, where icy and rocky leftovers from planet formation linger. The new Spitzer data suggest that the Almahata Sitta meteorite may have originated in our own Kuiper Belt.

The Kuiper Belt was home to a vastly greater number of these frozen bodies, collectively dubbed Kuiper Belt objects. About 4 billion years ago, some 600 million years after our solar system formed, scientists think the Kuiper Belt was disturbed by a migration of the gas-giant planets Jupiter and Saturn. This jarring shift in the solar system's gravitational balance scattered the icy bodies in the Kuiper Belt, flinging the vast majority into interstellar space and producing cold dust in the belt. Some Kuiper Belt objects, however, were set on paths that crossed the orbits of the inner planets.

The resulting bombardment of comets lasted until 3.8 billion years ago. After comets impacted the side of the moon that faces Earth, magma seeped out of the lunar crust, eventually cooling into dark "seas," or maria. When viewed against the lighter surrounding areas of the lunar surface, those seas form the distinctive "Man in the Moon" visage. Comets also struck Earth or incinerated in the atmosphere, and are thought to have deposited water and carbon on our planet. This period of impacts might have helped life form by delivering its crucial ingredients.

"We think the Eta Corvi system should be studied in detail to learn more about the rain of impacting comets and other objects that may have started life on our own planet," Lisse said.


TOPICS: Astronomy; Science
KEYWORDS: catastrophism; comet; space; spitzer; telescope; xplanets

This artist's conception illustrates a storm of comets around a star near our own, called Eta Corvi. Evidence for this barrage comes from NASA's Spitzer Space Telescope, whose infrared detectors picked up indications that one or more comets was recently torn to shreds after colliding with a rocky body. Image credit: NASA/JPL-Caltech

1 posted on 10/21/2011 1:06:54 PM PDT by Red Badger
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To: SunkenCiv; KevinDavis

Ping!........


2 posted on 10/21/2011 1:07:39 PM PDT by Red Badger (Obama's number one economics advisor must be a Magic Eight Ball.................)
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To: Red Badger

NASA named a device after #9?


3 posted on 10/21/2011 1:10:16 PM PDT by Paladin2
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To: Paladin2

Different client.........


4 posted on 10/21/2011 1:12:48 PM PDT by Red Badger (Obama's number one economics advisor must be a Magic Eight Ball.................)
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To: Paladin2

From WIKI:

In keeping with NASA tradition, the telescope was renamed after successful demonstration of operation, on December 18, 2003. Unlike most telescopes which are named after famous deceased astronomers by a board of scientists, the name for SIRTF was obtained from a contest open to the general public.

The contest led to the telescope being named in honor of Lyman Spitzer, one of the 20th century’s great scientists


5 posted on 10/21/2011 1:14:31 PM PDT by Red Badger (Obama's number one economics advisor must be a Magic Eight Ball.................)
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To: Red Badger
".....and was a member of Skull and Bones."

Hmmm...

6 posted on 10/21/2011 1:17:02 PM PDT by Paladin2
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To: Red Badger
That is our arm chair view of the Arachnids laying siege to one of the planets of the Federation.

The Roughnecks will be dispatched to take out the bugs on their home turf of Klendathu.

7 posted on 10/21/2011 1:33:18 PM PDT by Deaf Smith
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To: Deaf Smith

SAY IT AIN’T SO LOL!


8 posted on 10/21/2011 2:12:35 PM PDT by brivette
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To: KevinDavis; annie laurie; Knitting A Conundrum; Viking2002; Ernest_at_the_Beach; Mmogamer; ...

Thanks Red Badger. This is a three-list-ping topic, nice job.
 
X-Planets
· join · view topics · view or post blog · bookmark · post new topic · subscribe ·
Google news searches: exoplanet · exosolar · extrasolar ·

9 posted on 10/21/2011 4:26:42 PM PDT by SunkenCiv (It's never a bad time to FReep this link -- https://secure.freerepublic.com/donate/)
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To: 75thOVI; agrace; aimhigh; Alice in Wonderland; AndrewC; aragorn; aristotleman; Avoiding_Sulla; ...

Thanks Red Badger. This is a three-list-ping topic, nice job.


10 posted on 10/21/2011 4:28:06 PM PDT by SunkenCiv (It's never a bad time to FReep this link -- https://secure.freerepublic.com/donate/)
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To: Red Badger; brytlea; cripplecreek; decimon; bigheadfred; KoRn; Grammy; married21; steelyourfaith; ..

Thanks Red Badger. This is a three-list-ping topic, nice job.

An “extra, extra” ping to the APoD list members.


11 posted on 10/21/2011 4:28:09 PM PDT by SunkenCiv (It's never a bad time to FReep this link -- https://secure.freerepublic.com/donate/)
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To: Deaf Smith

Actually, I think it is “associates” of the Centauri bombarding the Narn homeworld.


12 posted on 10/21/2011 5:43:55 PM PDT by GreenLanternCorps ("Barack Obama" is Swahili for "Jimmy Carter".)
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Spitzer Sees the Aftermath of a Planetary Collision [2005]

Spitzer Sees the Aftermath of a Planetary Collision | Universe Today | Jan. 10, 2005 | Dolores Beasley and Gay Yee Hill | Posted on 01/13/2005 8:50:18 PM PST by SunkenCiv

13 posted on 10/21/2011 6:10:56 PM PDT by SunkenCiv (It's never a bad time to FReep this link -- https://secure.freerepublic.com/donate/)
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To: Red Badger; SunkenCiv

I’m jealous! Spitzer (whoever he is*) can see this, but I can’t even see tonight’s meteor shower due to clouds.
That Spitzer character must have one heck of a set of eyeballs.

.

.

.

*Simon & Garfunkle reference:
“He doesn’t dig poetry.
He’s so unhip that,
When you say Dylan,
he thinks you’re talking about Dylan Thomas,
Whoever he was.
The man ain’t got no culture, ...”


14 posted on 10/21/2011 6:52:20 PM PDT by ApplegateRanch ("Public service" does NOT mean servicing the people, like a bull among heifers.)
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To: ApplegateRanch
I’m jealous! Spitzer (whoever he is*) can see this, but I can’t even see tonight’s meteor shower due to clouds. That Spitzer character must have one heck of a set of eyeballs.

He found Client #9...


15 posted on 10/21/2011 7:12:23 PM PDT by COBOL2Java (Obama is the least qualified guy in whatever room he walks into.)
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To: ApplegateRanch

This is the Spitzer which doesn’t have a talk show or a big bill for prostitution.


16 posted on 10/21/2011 7:43:10 PM PDT by SunkenCiv (It's never a bad time to FReep this link -- https://secure.freerepublic.com/donate/)
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To: SunkenCiv

The Spitzer I’m most familiar with designed bullets. ;-)


17 posted on 10/21/2011 9:10:06 PM PDT by ApplegateRanch ("Public service" does NOT mean servicing the people, like a bull among heifers.)
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To: SunkenCiv

...and Lyman is one of the standard reloading manuals!


18 posted on 10/21/2011 9:22:55 PM PDT by ApplegateRanch ("Public service" does NOT mean servicing the people, like a bull among heifers.)
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To: ApplegateRanch
...tonight’s meteor shower due to clouds

...Missed the Perseid's because of this In Narfook, VA, Hope To have better vis tonight. Orion is my top constellation, and the moon is on the wane, just east. Should be a good show, saw a couple last night. Good viewing to you...

19 posted on 10/22/2011 7:46:13 AM PDT by gargoyle (...it becomes necessary for one people to dissolve the political bands which have connected them...)
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To: ApplegateRanch

:’D


20 posted on 10/22/2011 5:50:21 PM PDT by SunkenCiv (It's never a bad time to FReep this link -- https://secure.freerepublic.com/donate/)
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