注意IAU没有定义过系外行星,这个定义仅适用于太阳系
The definition of planet set in 2006 by the International Astronomical Union (IAU) states that, in the Solar System, a planet is a celestial body whic
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发表于 2013-10-12 06:20
The definition of planet set in 2006 by the International Astronomical Union (IAU) states that, in the Solar System, a planet is a celestial body which:
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发表于 2013-10-13 06:24