star density的意思|示意

The density means that this material is certain to be crystalline, that is, a large part of the star may be similar to a diamond.

密度测量结果意味着这些物质一定是水晶，而被许多人珍视的钻石，实质是碳元素的单质晶体。 也就是说，那颗行星的大部分可能都与钻石类似。

How big they get depends on their distance from the star and the density and composition of the protoplanetary nebula.

他们的形体能达到多大取决于他们离恒星的距离和原行星星云的组成。

They discovered that star formation is pretty well non-existent until the surface density reaches a certain threshold in parts of the cloud.

他们发现恒星只有在表面密度达到一定的阀值时才会较好的形成。