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View Full Version : Comets May Be the Source of Earth's Water



Fraser
2006-Mar-24, 04:36 AM
SUMMARY: Astronomers have discovered three icy comets that may help explain how the Earth's oceans formed. These new comets have asteroid-like orbits, and formed in the warm inner Solar System, not in the outer reaches like most comets. This lends evidence to the theory that the main asteroid belt isn't bone dry, as previously believed, but is actually quite rich in ice - a major source of our planet's water.

View full article (http://www.universetoday.com/am/publish/comet_water_source.html)
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ToSeek
2006-Mar-24, 05:57 PM
Clandestine comets found in main asteroid belt (http://www.newscientistspace.com/article.ns?id=dn8887&feedId=online-news_rss20)


You do not have to look to the outer edges of the solar system, or even out beyond Neptune to observe a reservoir of comets. A bevy of the ice-containing bodies lies disguised as main-belt asteroids between Mars and Jupiter, claim astronomers from the University of Hawaii, US.

David Jewitt and Henry Hsieh have dubbed the new population "main belt comets". They describe three objects with near circular, flat orbits in the asteroid belt that stream volatile materials, producing an observable tail for weeks and months at a time.

The finding backs a theory that ice-bearing asteroids or "comets" from this much closer region may have played an important role in forming the Earth's oceans.

antoniseb
2006-Mar-24, 08:58 PM
In an unusual sitution you've been ToSeek'ed by UT.
I'm merging the threads.