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N an astronomical unit of mass equal to the sun's mass, 1.981 × 1030 kilograms 太阳质量 ( symbol: M⊙)
Astronomers tried to estimate what solar mass could produce the required luminosity to explain liquid water on these planets.
天文学家试图通过估计太阳质量能产生多少必需的光来解释这些行星上的液态水。
So, by not collapsing into denser regions, these massive nebulae, like the 100,000 solar mass California Nebula shown above, don't necessarily start making baby stars and planets.
所以如果不被压缩到很致密,这些大质量星云,比如有太阳质量100,000倍的California星云,则不一定会形成新生恒星和行星。
Second, Jupiter's enormous mass prevents most Sun-bound comets from penetrating the inner solar system.
其次,木星的巨大质量阻止了大多数与太阳结合的彗星穿透太阳系内部。
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