Unveiling Gliese 229B: The First Brown Dwarf Binary System Discovered Introduction to Gliese 229B Gliese 229B, the first identified brown dwarf, has been the subject of extensive research since Caltech scientists discovered it in 1995. Yet, the per plexing question of why it is dimmer than ex pected for its mass endures. What are Brown Dwarfs? Brown dwarfs have masses between those of stars and gas giants like Ju piter. Des pite astronomers estimating Gliese 229B's mass to be 70 times that of Ju piter, its observed brightness is unex pectedly low for an object of this size. The Breakthrough Discovery An international team of astronomers led by Caltech has finally resolved the mystery: Gliese 229B is, in fact, a close binary system of two brown dwarfs, with masses of 38 and 34 times that of Ju piter, orbiting each other every 12 days. Their combined luminosity aligns with the ex pected brightness for two small brown dwarfs of this size. Insights from Researchers "Gliese 229B w...
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