Related topics: nasa , earth , solar system , asteroid
Comet
hideA 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.
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News tagged with comet
Scientist uncovers relics of ancient cosmos
Space & Earth / Space Exploration
Dec 14, 2009 |
4.5 / 5 (19) |
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(PhysOrg.com) -- A University of Manchester scientist, working as part of an international team, has uncovered an unexpectedly rich trove of relicts from the ancient cosmos.
Kansas scientists probe mysterious possible comet strikes on Earth
Space & Earth / Space Exploration
Dec 14, 2009 |
4.3 / 5 (16) |
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It's the stuff of a Hollywood disaster epic: A comet plunges from outer space into the Earth's atmosphere, splitting the sky with a devastating shock wave that flattens forests and shakes the countryside.
Superior Super Earths
Space & Earth / Space Exploration
Nov 30, 2009 |
4.6 / 5 (55) |
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Super Earths are named for their size, but these planets - which range from about 2 to 10 Earth masses - could be superior to the Earth when it comes to sustaining life. They could also provide an answer to ...
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Hubble Finds Smallest Kuiper Belt Object Ever Seen
Space & Earth / Space Exploration
Dec 16, 2009 |
4.9 / 5 (20) |
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(PhysOrg.com) -- NASA's Hubble Space Telescope has discovered the smallest object ever seen in visible light in the Kuiper Belt, a vast ring of icy debris that is encircling the outer rim of the solar system ...
Icy moons of Saturn and Jupiter may have conditions needed for life
Dec 15, 2009 |
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(PhysOrg.com) -- Scientists once thought that life could originate only within a solar system's "habitable zone," where a planet would be neither too hot nor too cold for liquid water to exist on its surface. ...
New planet discoveries suggest low-mass planets are common around nearby stars (w/ Video)
Dec 14, 2009 |
4.8 / 5 (19) |
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(PhysOrg.com) -- An international team of planet hunters has discovered as many as six low-mass planets around two nearby Sun-like stars, including two "super-Earths" with masses 5 and 7.5 times the mass of ...
'Extreme' genes shed light on origins of photosynthesis
Dec 11, 2009 |
5 / 5 (3) |
1
(PhysOrg.com) -- While most school children understand that green plants photosynthesize, absorb carbon dioxide and produce oxygen, few people consider the profound global-scale effects that photosynthesis has had on Earth. ...
Best (Meteor) Shower of 2009 - No Towel Required
Space & Earth / Space Exploration
Dec 10, 2009 |
not rated yet |
1
(PhysOrg.com) -- Bundle up and get ready to watch a fiery lightshow stirred up by dead comets in Earth's upper atmosphere during the cold of winter in the dead of night. The annual Geminid meteor shower is ...
The 2009 Geminid Meteor Shower (w/ Video)
Space & Earth / Space Exploration
Dec 08, 2009 |
4.5 / 5 (6) |
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Make hot cocoa. Bundle up. Tell your friends. The best meteor shower of 2009 is about to fall over North America on a long, cold December night.
Geminid meteor shower to peak on 14th December 2009
Space & Earth / Space Exploration
Dec 03, 2009 |
not rated yet |
0
(PhysOrg.com) -- The annual Geminid meteor shower is predicted to peak at 0510 GMT on 14th December. Meteors (or ‘shooting stars’) are the result of small particles entering the Earth’s atmosphere at high speed, heating up ...
NASA: Floating 'junk' no threat to space station
Space & Earth / Space Exploration
Nov 28, 2009 |
4.7 / 5 (3) |
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(AP) -- NASA says a piece of old space junk that it's been tracking for a few days is no threat to the International Space Station.
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