First classified a planet, then an asteroid and then a "dwarf planet" with some traits of a moon—the more scientists learn about Ceres, the weirder it becomes. And new observations of the sphere of rock and ice circling our Sun between Mars and Jupiter have added to the mystery, researchers said Monday. Astrophysicists have been looking to a $473-million (446-million-euro) mission to test theories that Ceres is a water-rich planetary "embryo"—a relic from the birth of the Solar System some 4.5 billion years ago. But an early batch of data from NASA's Dawn probe, unveiled at a conference of the European Geosciences Union (EGU), may have made the Ceres riddle even greater.
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Read more about Ceres: The 'Dwarf Planet' Spawns Giant Mystery - New Images Just Released (Video)
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