What's the difference between a star and a planet? It's not that stars are made of gas and planets are made of rock: Jupiter is gaseous, after all. It's not that stars are big and planets are small: neutron stars can be as small as your average city. Stars are at least hotter than planets, right? Well, not if the gas giant KELT-9b has anything to say about it.
How Hot Is It?
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Written by Ashley Hamer July 1, 2017
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