... earth-approaching object 近地天体 earth-crossing asteroid 越地小行星 earth-crossing comet 越地彗星 ...
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earth-crossing asteroid 越地小行星
Saturn-crossing asteroid 越土小行星
moon-crossing asteroid 越月小行星
Mars-crossing asteroid 越火小行星
crossing asteroid
穿越小行星
以上为机器翻译结果，长、整句建议使用 人工翻译 。
After a million years or so the influence of these large planets, it was thought, caused the fragments to be ejected from the asteroid belt altogether potentially ending up in an Earth-crossing orbit.
ECONOMIST: Celestial mechanics: A rock in a hard place | The
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