gravitational contraction

An interpretation of the present peculiar distribution of angular momentum in the solar system is given : before entering the main sequence , the sun while undergoing gravitational contraction lost most of its angular momentum ;

本文对今天太阳系角动量的特殊分布提出一种说明：太阳在进入主序以前，在引力收缩阶段内曾经大量抛射物质，通过沙兹曼机制而损失了绝大部分角动量；

The planet would start off uniformly lukewarm-probably a bit over room temperature-and the gravitational contraction would heat the deep interior by a handful of degrees .

起初整个星球的温度都很均匀，差不多比室温高一些，随后重力收缩会使内部的温度上升几摄氏度。

Meat doesn 't compress very well , so it would undergo only a little bit of gravitational contraction , and we 'd end up with a mole planet slightly larger than the Moon .

肉不怎么能被压缩，所以这个大肉球只会因重力作用而缩小一点，最后我们将看到一个比月球稍大一些的鼹鼠星。