Where Is the Border Between Planet and Brown Dwarf?

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Blurred boundaries: Brown dwarfs and massive gas planets are often similar to confusion. Now astronomers may have found a distinctive feature. According to this, brown dwarfs rotate significantly slower than their planetary counterparts, they are further away from the maximum possible speed, as reported by the team in the Astronomical Journal. This could help to better define the blurry boundary between planets and "failed stars." Brown dwarfs a…

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Astronomers could have solved a problem that has existed for decades: the distinction between particularly massive gas planets and brown dwarfs. Both substellar celestial bodies have similar temperatures, gas envelopes and brightness, thereby blurring the boundary between the planet and "failed star". But now researchers have found a feature that could help define the boundary better. [...] The article Where is the boundary between the planet an…