News tagged with comet
Did ancient Mars have a runaway greenhouse?
Cosmic impacts that once bombed Mars might have sent temperatures skyrocketing upward on the Red Planet in ancient times, enough to set warming of the surface on a runaway course, researchers say.
Space & Earth / Space Exploration
May 24, 2012 |
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Research team claims to have found evidence Lake Cheko is impact crater for Tunguska Event
(Phys.org) -- Early on the morning of June 30th, 1908, a huge explosion occurred in a remote part of Siberia near the Podkamennaya Tunguska River. So great was the blast that trees were knocked down in neat ...
Space & Earth / Earth Sciences
May 21, 2012 |
4.5 / 5 (24) |
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Swift satellite monitors departing Comet Garradd
(Phys.org) -- An outbound comet that provided a nice show for skywatchers late last year is the target of an ongoing investigation by NASA's Swift satellite. Formally designated C/2009 P1 (Garradd), the unusually ...
Space & Earth / Space Exploration
Apr 13, 2012 |
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Herschel spots comet massacre around nearby star
(Phys.org) -- ESA’s Herschel Space Observatory has studied the dusty belt around the nearby star Fomalhaut. The dust appears to be coming from collisions that destroy up to thousands of icy comets every ...
Apr 12, 2012 |
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Simulations unravel mysteries of 2009 Jupiter impact
(PhysOrg.com) -- During July of 1994, both amateur and professional astronomers were captivated as comet Shoemaker/Levy 9 broke apart and slammed into the atmosphere of Jupiter. While these types of impacts ...
Space & Earth / Space Exploration
Mar 30, 2012 |
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Comet Wild2: First evidence of space weathering
(PhysOrg.com) -- The traditional picture of comets as cold, icy, unchanging bodies throughout their history is being reappraised in the light of analyses of dust grains from Comet Wild2. A team led by the ...
Space & Earth / Space Exploration
Mar 27, 2012 |
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New evidence that comets deposited building blocks of life on primordial Earth
New research reported today at the 243rd National Meeting & Exposition of the American Chemical Society (ACS) provides further support for the idea that comets bombarding Earth billions of years ago carrie ...
Space & Earth / Space Exploration
Mar 27, 2012 |
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Artificial comet contains building blocks of life
The first molecules of life form naturally in comets, reveals a French-German study led by Uwe Meierhenrich and Cornelia Meinert at the Institut de Chimie de Nice and by Louis Le Sergeant d'Hendecourt at the ...
Space & Earth / Space Exploration
Mar 21, 2012 |
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How did comet Lovejoy survive its trip around the sun?
It was just about three months ago that the astronomy world watched in awe as the recently-discovered comet Lovejoy plummeted toward the Sun on what what expected to be its final voyage, only to reappear on ...
Space & Earth / Space Exploration
Mar 14, 2012 |
4.7 / 5 (6) |
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Villain in disguise: Jupiter's role in impacts on Earth
Jupiter is often credited for shielding Earth from catastrophic asteroid and comet impacts. But new simulations of the influence of gas giant planets in solar systems casts doubt on Jupiter's reputation as ...
Space & Earth / Space Exploration
Mar 13, 2012 |
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Study supports theory of extraterrestrial impact
A 16-member international team of researchers that includes James Kennett, professor of earth science at UC Santa Barbara, has identified a nearly 13,000-year-old layer of thin, dark sediment buried in the ...
Space & Earth / Earth Sciences
Mar 05, 2012 |
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UH scientists analyze a tiny comet grain to date Jupiter's formation
Particles from comet 81P/Wild 2 brought to Earth in 2006 by NASA's Stardust spacecraft indicate that Jupiter formed more than three million years after the formation of the first solids in our Solar System. ...
Mar 01, 2012 |
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New comet discovered by amateur astronomer
“Friday, February 10th 2012 just felt like the perfect night for a comet to be discovered by an amateur astronomer,” writes Fred Bruenjes on his astronomy blog. And, this past Friday night, that’s ...
Space & Earth / Space Exploration
Feb 14, 2012 |
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Mission to land on a comet
Europe’s Rosetta spacecraft is en route to intercept a comet– and to make history. In 2014, Rosetta will enter orbit around comet 67P/Churyumov-Gerasimenkoand land a probe on it, two firsts.
Space & Earth / Space Exploration
Feb 03, 2012 |
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Christmas comet Lovejoy captured at Paranal Observatory
(PhysOrg.com) -- The recently discovered Comet Lovejoy has been captured in stunning photos and time-lapse video taken from ESO’s Paranal Observatory in Chile. The comet graced the southern sky after ...
Space & Earth / Space Exploration
Dec 24, 2011 |
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Comet
A comet is a Small Solar System Body that orbits the Sun. When close enough to the Sun, a comet exhibits a visible coma (fuzzy "atmosphere"), and sometimes a tail, both because of the effects of solar radiation upon the comet's nucleus. Comet nuclei are themselves loose collections of ice, dust and small rocky particles, ranging from a few kilometers to tens of kilometers across.
For more information about Comet, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
