星云的

You can see nebulae in the clear summer sky.

的夏夜可以看到天上的云。

A bit of mould is a pleiad of flowers;a nebula is an ant-hill of stars.

一粒霉菌是一簇美不胜收的花朵，一撮云是无数天体的蚁聚。

Explanation: Cosmic clouds of hydrogen gas and dust abound in this gorgeous skyscape, stretching through Monocerous in the neighborhood of The Cone Nebula.

这张绚丽的天空美景中，充满了氢气和尘埃组成的宙云，一直延伸到锥形云附近的麒麟座内。

As our nebula began to collapse under its own gravity and spin faster, a dense clump of matter formed in the center. It's called a protostar.

当我们的云自身重力作用下崩溃和更加快速地旋转时，云中心形成了密集的物质块。这叫做。