Extragalactic nebula is invisible to the naked eye.
我们用肉眼是看不到外星。
Extragalactic nebula is invisible to the naked eye.
我们用肉眼是看不到外星。
A bit of mould is a pleiad of flowers;a nebula is an ant-hill of stars.
粒霉菌是簇美不胜收花朵,撮星云是无数天体蚁聚。
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.
当我们星云在自身重力作用下崩溃和更加快速地旋转时,星云中心形成了密集物质块。这叫做原恒星。
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