月球是离地球最近的天体，也是迄今为止人类到达的最远之处。
The farthest place our own kind has yet visited is the companion moon, our nearest celestial neighbor.
今晚天王星距离地球超过2.5光小时远。相对的，月球——我们最近的邻近天体——距离地球只有1.3光秒远。
Uranus looms well over 2.5 light-hours away from Earth tonight. In contrast, the moon - our nearest celestial neighbor - resides only 1.3 light-seconds away.
太阳是离地球最近的一颗恒星，也是太阳的中心天体，它的质量占太阳系总质量的99.865%。
The sun is earth's nearest a star, and is also the center of the sun, it accounts for the quality of the celestial 99.865% of total quality of the solar system.
太阳是离地球最近的一颗恒星，也是太阳的中心天体，它的质量占太阳系总质量的99.865%。
The sun is earth's nearest a star, and is also the center of the sun, it accounts for the quality of the celestial 99.865% of total quality of the solar system.
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