Extragalactic nebula is invisible to the naked eye.
我们用肉眼是看不到河外星。
Extragalactic nebula is invisible to the naked eye.
我们用肉眼是看不到河外星。
You can see nebulae in the clear summer sky.
晴朗夏夜可以看到天上星云。
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花朵,一撮星云是无数天体蚁聚。
The tiny but intriguing yellowish arc visible near the blue nebulae marks young variable star R Coronae Australis.
蓝色星云附近,微但迷人微黄色弧状可见物标出了年轻可见恒星南冕座R星位置。
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.
当我们星云自身重力作用下崩溃和更加快转时,星云中心形成了密集物质块。这叫做原恒星。
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