因此，行星质量的增大，离心力加大是退行的主要原因。
Therefore, the planet's mass increases, the centrifugal force to increase is the main regression.
它几乎与我们自己的行星和体积属性相同，包括质量、密度和大小。
It is nearly identical to our own planet and bulk properties such as mass, density, and size.
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。
Astronomers tried to estimate what solar mass could produce the required luminosity to explain liquid water on these planets.
应用推荐