Astronomers spy puzzlingly 'perfect' cosmic orb with unknown size and location
Space.com   a day ago
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Astronomers spy puzzlingly 'perfect' cosmic orb with unknown size and location  Live ScienceMysteriously Perfect Sphere Spotted in Space by Astronomers  ScienceAlertThis Perfectly Spherical Supernova Is Weirding Us Out  GizmodoAstronomers Baffled...