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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