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标 题Re: IAU GA 2006 草案决议
发信站Deep Space Nine (Fri Aug 25 12:34:04 2006)
转信站ptt!ctu-reader!news.nctu!ds9
※ 引述《[email protected] (神无月 孝臣)》之铭言：
: 稍微整理了一下
: 草案：
: =============================================================================
: 5A
: The IAU therefore resolves that planets and other bodies in our Solar System
: be defined into three distinct categories in the following way:
: (1) A planet is a celestial body that (a) is in orbit around the Sun, (b)
: has sufficient mass for its self-gravity to overcome rigid body forces so
: that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has
: cleared the neighbourhood around its orbit.
: 行星：
: (a)要绕着太阳旋转
: (b)要有足够的质量使自身的重力可和刚体的力维持流体静力平衡（也就是要接近圆形）
: (c)有能力能清除其轨道附近其他物体的天体
has cleared ??
有点疑惑, 是说 1. 将附近星体直接吸纳近行星本体 或 捕获当成其卫星, 应该是这
两重意义吧?!而且还是用完成式的, 表示是要已经清掉了才算?!
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1F：推 ccc73123:没错 所以谷神星不算行星 因为他没清掉小行星带的天体 08/26 03:01