Revealed: The hottest planet ever found!
The exoplanet is a 'hot Jupiter' - a gas giant that orbits its star closer than Mercury does the sun.
It sports a glowing, comet style tail as it literally evaporates under the ultraviolet radiation from KELT-9 - the host star, which at 9,897°C is almost twice as hot as our sun (5,600°C).
KELT-9b is almost three times bigger than Jupiter, yet only half as dense, as the intense heat has caused its atmosphere to puff up like a balloon.
It's locked to the star by enormous gravitational tidal forces - as the moon is to Earth - but the day side is perpetually blasted by extreme radiation.
As a result, molecules such as water, carbon dioxide and methane cannot form.