据NASA官方网站报导，这颗炙热的“类彗星行星”(cometary planet)被命名为HD 209458b，由于运转轨道太靠近恒星，其高温的表面大气散逸至太空中。
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cometary planet
彗星星球
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Yet, upon further reflection, human impact on the planet is a direct analogue of the Cretaceous cometary collision.
然而进一步的说，人类对于地球的影响，完全相当于白垩纪的彗星撞击。
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They were all blasted off the Red Planet by some asteroid or cometary impact, and then spent millions of years travelling through space before falling to Earth.
BBC: Mars meteorite 'Black Beauty' is in a class of its own
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