WASP-107b was discovered in 2017, and quickly found to be weird. It’s a hot Jupiter, a gas giant orbiting its star very closely, at a distance of only 9 million kilometers. Mercury orbits the Sun at roughly 60 million kilometers, so WASP-107b is
close. The host star, WASP-107, is an orange dwarf, smaller and cooler than the Sun, but still not something you want to be that close to unless baking your entire planet is your goal. The temperature of WASP-107b is likely around 1,000° C (1,800°F).
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Artwork of a hot Jupiter , an exoplanet the size of Jupiter but orbiting its host star at a small fraction of Earth s distance to the Sun. Credit: University of Warwick/Mark Garlick