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When Is a Star Not a Star? - Universe Today
When it’s a brown dwarf — but where do we draw the line? Often called “failed stars,” brown dwarfs are curious cosmic creatures. They’re kind of like swollen, super-dense Jupiters, containing huge amounts of matter yet not quite enough to begin fusing hydrogen in their cores. Still, there has to be some sort of specific … Continue reading "When Is a Star Not a Star?"