现在,天文单位和万有引力常数的数值都已经被精确的测量,然而,还是不太常用太阳质量来表示太阳系的其他行星或联星的质量;只在大质量天体的测量上使用。今天,使用行星际雷达已经测出很准确的天文单位和" G ",但是太阳质量在习俗中仍然继续被当成天文学历史上未解的谜题来探究。
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Solar mass 太阳质量
The solar mass (M☉) is a standard unit of mass in astronomy that is used to indicate the masses of other stars, as well as clusters, nebulae and galaxies. It is equal to the mass of the Sun, about two nonillion kilograms:
The above mass is about 7005332946000000000♠332946 times the mass of Earth (M⊕), or 7003104800000000000♠1048 times the mass of Jupiter (MJ).