A planet is a celestial body orbiting a star.

行星是环绕著恒星公转的天体。

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No celestial body is going to collide with Earth or come close enough to have any noticeable effects.

没有什么天体将和地球发生冲突，或者靠的足够近而对地球有任何显著的影响。

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Racking up another Soviet first, this mission became the first man-made object to successfully orbit another celestial body.

这艘探测器又前让苏联创造了一个第一：它成为首个成功围绕另外一个天体运行的人造物体。

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Sightings of the celestial body were reported on Twitter in areas such as Cornwall, Hampshire, Lancashire, south Wales and Worcestershire.

BBC: Meteor spotted in night sky in England and Wales

No celestial body has the same gravitational pull everywhere on its surface.

FORBES: NASA Prepares To Crash Its Probes Into The Moon

In these pages, Roland Lehoucq and Jean-Marc Bonnet-Bidaud remind us that, even as our gaze turns heavenwards, our feet remain firmly planted on a celestial body.

UNESCO: Open Access to Scientific Information