<ul><li>Brown dwarfs are unique objects in the universe, falling between the size of a planet and a star.</li><li>They don't generate their own energy through nuclear fusion, but emit radiation from their leftover heat.</li><li>The largest brown dwarfs are similar in appearance to red dwarfs, while the smallest ones can only be detected using infrared telescopes.</li><li>Brown dwarfs can briefly partake in a fusion reaction, converting deuterium into Helium-3, but eventually cool off and continue to dim.</li></ul>

What makes brown dwarfs so weird

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