News tagged with comet theory
No evidence for ancient comet or Clovis catastrophe, archaeologists say
(PhysOrg.com) -- New research challenges the controversial theory that the impact of an ancient comet devastated the Clovis people, one of the earliest known cultures to inhabit North America.
Other Sciences / Archaeology & Fossils
Sep 29, 2010 |
3.9 / 5 (14) |
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Charcoal evidence tracks climate changes in Younger Dryas
A new study reports that charcoal particles left by wildfires in sediments of 35 North American lake beds don't readily support the theory that comets exploding over the continent 12,900 years ago sparked ...
Space & Earth / Earth Sciences
Jan 28, 2009 |
4.4 / 5 (7) |
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Search results for comet theory
Stellar embryos
(PhysOrg.com) -- Stars form as gravity coalesces the gas and dust in interstellar clouds until the material produces clumps dense enough to become stars. But precisely how this happens, and whether or not ...
Jan 23, 2012 |
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Seeking a pot of geological gold
Researchers are moving a step closer to solving one of the greatest murder mysteries of all time. It happened roughly 200 million years ago, marking the boundary between the Triassic and Jurassic periods, ...
Space & Earth / Earth Sciences
Dec 16, 2011 |
5 / 5 (5) |
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NASA developing comet harpoon for sample return
(PhysOrg.com) -- The best way to grab a sample of a rotating comet that is racing through the inner solar system at up to 150,000 miles per hour while spewing chunks of ice, rock and dust may be to avoid the ...
Space & Earth / Space Exploration
Dec 13, 2011 |
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Swift finds a gamma-ray burst with a dual personality (w/ video)
(PhysOrg.com) -- A peculiar cosmic explosion first detected by NASA's Swift observatory on Christmas Day 2010 was caused either by a novel type of supernova located billions of light-years away or an unusual ...
Nov 30, 2011 |
4.1 / 5 (8) |
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Every way devised to deflect an asteroid
With asteroid 2005 YU55 passing close by Earth yesterday, this rather unsettlingly near flyby has many people wondering if we would be able to divert an asteroid that was heading for an intersection with Earth ...
Space & Earth / Space Exploration
Nov 10, 2011 |
5 / 5 (5) |
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NASA studying ways to make 'tractor beams' a reality
Tractor beams -- the ability to trap and move objects using laser light -- are the stuff of science fiction, but a team of NASA scientists has won funding to study the concept for remotely capturing planetary ...
Oct 31, 2011 |
4.3 / 5 (21) |
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Planets smashed into dust near supermassive black holes
(PhysOrg.com) -- Fat doughnut-shaped dust shrouds that obscure about half of supermassive black holes could be the result of high speed crashes between planets and asteroids, according to a new theory from ...
Oct 28, 2011 |
3 / 5 (1) |
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Up close, asteroid seen to be chunk of would-be planet
A rare opportunity to observe an asteroid at close quarters has unveiled a remarkable rock that seems to be a precursor of a planet, astronomers reported on Thursday.
Space & Earth / Space Exploration
Oct 27, 2011 |
4.8 / 5 (6) |
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Astronomers discover complex organic matter in the universe
In today's issue of the journal Nature, astronomers report that organic compounds of unexpected complexity exist throughout the Universe. The results suggest that complex organic compounds are not the sole d ...
Oct 26, 2011 |
5 / 5 (31) |
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Nearby planet-forming disk holds water for thousands of oceans
(PhysOrg.com) -- For the first time, astronomers have detected around a burgeoning solar system a sprawling cloud of water vapor that's cold enough to form comets, which could eventually deliver oceans to ...
Oct 21, 2011 |
4.9 / 5 (13) |
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List of search results for comet theory
