heavenly body [天] 天体
heavenly body theory 天体理论
gravitational heavenly body 引潮天体
latitude of a heavenly body 天体黄纬
Mercury is a liquid metal, and Mercury, the planet, is the fastest moving heavenly body that naked eyes can see.
水银是液态金属，行星水星是肉眼能看到的运动最快的天体。
Mercury is a liquid metal, and mercury, the planet, is the fastest moving naked eye heavenly body. Mars, why is Mars red?
水银是一种液态金属，而水星这颗行星，是肉眼能看到的运动最快的天体。火星，为什么火星是红色的？
I mean, isn't it more sensible to think that a smaller heavenly body would orbit a larger one, rather than the opposite?
我的意思是，如果一个更小的天体会绕一个更大的天体运行，而不是大的围着小的转，不是更合理吗？
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