A******e
发帖数: 53 | 1 【 以下文字转载自 Joke 讨论区 】
发信人: Albacore (LongFin), 信区: Joke
标 题: Re: 三体是很棒的科幻小说，虽然其基本思想不科学 (转载)
发信站: BBS 未名空间站 (Mon Apr 21 12:58:35 2014, 美东)
lz(Jeremy Lin)'s "understanding" is a good joke.
the center of mass is very different from the center of gravity. They may
coincide in simple systems but this is not generally true.
In the case of 3-body motion, the center of mass may be steady but the
center of gravity will change all the time. So the planet do not have simple
motion. |
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