Last Updated：2025/11/21
(astronomy) A starlike object that contracts to about the volume of the planet Jupiter after its formation phase; its mass may range from several times that of Jupiter, such that it fuses deuterium, up to just below the threshold of sustained hydrogen fusion.
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brown dwarf
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Source Word
brown dwarf
Noun
Japanese Meaning
（天文学用語）形成段階を経た後、約木星の体積に収縮する、星に似た天体。質量は木星の数倍から、持続的な水素融合が起こる閾値直前までの範囲にある。
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