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Comets may be spawned when mum breaks up

Comets may be spawned when mum breaks up

作者:邝褫谥  时间:2017-04-01 01:01:04  人气:

By David Shiga ARE comets born in great swarms? The puzzling abundance of comets in short solar orbits has led a pair of astronomers to suggest that they are fragments of larger bodies that crumbled as they entered the inner solar system. Short-period comets take less than 200 years to circle the sun and are thought to originate in the Kuiper belt of icy objects beyond Neptune. Some Kuiper-belt objects (KBOs) are in vulnerable orbits that allow the gravity of the outer planets to tug them inwards, where the sun’s heat turns them into comets. However,