This Exoplanet Is So Hot, It Might Be Evaporating

Astronomers recently announced the discovery of the hottest known giant exoplanet.

Sitting 650 light years away in the constellation Cygnus, Kelt-9b is a scorching ball of gas roughly¬†three times the size of Jupiter. Temperatures there are estimated to reach 7,800 degrees Fahrenheit, hot enough that the planet’s atmosphere may be evaporating away into space, leaving a comet-like tail in its wake.

Kelt-9b is so hot thanks to an extremely close-in orbit that takes it around its star just

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