这些行星离恒星过近意味着它们都被熔岩所覆盖。
Their proximity to their stars could mean they are covered in lava.
小行星在过于飞近地球之前可能会再三考虑一下。
Asteroids may want to think twice before they swing too close to Earth.
约曼斯表示，在可预知的未来，对近地小行星的探测研究仍然会继续下去。
Still, Yeomans admits that the NEO search will likely continue for the foreseeable future.
地球是离太阳第三近的行星。
其中许多行星的轨道距其主恒星极近，因此这些行星是炽热的。
Many of them orbit precariously close to their parent stars, so they scorching hot.
近地太空中的小行星和彗星们持续威胁着我们的星球。
Asteroids and comets in nearby space pose a constant threat to our planet.
近地太空中的小行星和彗星们持续威胁着我们的星球。
Asteroids and comets in nearby space pose a constant threat to our planet.
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