Brown dwarfs glow without fusion
Brown dwarfs are fascinating celestial objects that bridge the gap between planets and stars, glowing faintly from internal heat rather than nuclear fusion, and outnumbering stars in our galaxy.
Brown dwarfs are cosmic oddities, too big to be planets but too small to be stars. They don't power themselves with nuclear fusion like stars do. Instead, these objects, 13 to 80 times Jupiter's mass, glow faintly from their own gravitational contraction and leftover heat, primarily visible in infrared light.
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