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NASA's exoplanet-hunting spacecraft TESS has spotted a 'super-Earth' in the habitable zone of its red dwarf star, with indications it may have Earth-sized company.
NASA's Hubble Space Telescope has discovered carbon dioxide in the atmosphere of a planet orbiting another star. The Jupiter-sized planet, called HD 189733b, is too hot for life, but the Hubble observations are a proof-of-concept demonstration that the basic chemistry for life can be measured on planets orbiting other stars.
Scientists aren't sure whether humanity really detected moons outside the solar system.
Astronomers have discovered a planet 13 times as massive as Earth orbiting a star nine times less massive than the sun, a disparity in size that shouldn’t exist and challenges planet formation models.
Astronomers are surprised by a metal-rich, massive planet orbiting a tiny star because gas giants aren't supposed to be able to form around such diminutive red dwarf stars.