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NASA flyby of Jupiter's big moon Ganymede reveals auroras and huge unknown craters

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« NASA's work to align the James Webb Space Telescope is extending to more instruments

Liquid metal, ruby and sapphire could rain down on one hemisphere of a blisteringly hot giant exoplanet that is tidally locked in a tight orbit around its star. That is the conclusion of astronomers who have developed a detailed 3D model of the atmosphere of WASP-121b. »