The evolution of comets in the Oort cloud and Kuiper belt

被引：95
|
作者：
Stern, SA [1 ]
机构：
[1] SW Res Inst, Dept Space Studies, Boulder, CO 80302 USA
来源：
NATURE | 2003年 / 424卷 / 6949期
关键词：
D O I：
10.1038/nature01725
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Comets are remnants from the time when the outer planets formed, similar to4-4.5 billion years ago. They have been in storage since then in the Oort cloud and Kuiper belt-distant regions that are so cold and sparsely populated that it was long thought that comets approaching the Sun were pristine samples from the time of Solar System formation. It is now recognized, however, that a variety of subtle but important evolutionary mechanisms operate on comets during their long storage, so they can no longer be regarded as wholly pristine.
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收藏
页码：639 / 642
页数：4
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