Brown dwarfs are balls of warm gas that lack the mass necessary to fuse hydrogen at their core, as stars can.

棕矮星是一些由炽热的气体组成的球，它们缺乏像行星那样足够的质量来进行氢的燃烧。

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Brown dwarfs are balls of warm gas that lack the mass necessary to fuse hydrogen at their core, as stars can.

棕矮星是一些由炽热的气体组成的球，它们缺乏像行星那样足够的质量来进行氢的燃烧。

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