A star is made when a huge cloud of mostly hydrogen gas collapses.
当一个主要由氢气组成的星气团崩解时，一颗星星就形成了。
But most of the hydrogen in the Universe isn't in some exciting, star-forming region.
可惜，宇宙中只有很少一部分氢原子存在于引人注目的恒星形成区。
But most of the hydrogen in the Universe isn't in some exciting, star-forming region.
可惜，宇宙中只有很少一部分氢原子存在于引人注目的恒星形成区。
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