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Some parts of the dwarf planet Ceres harbored pockets of near-surface water for millions of years in the recent past, a new study suggests. Nearly three years since NASA's Dawn mission arrived at ...

A composite image showing the five dwarf planets recognized by the International Astronomical Union, plus the newly discovered trans-Neptunian object 2017 OF201. The TNO is potentially large enough to ...

A rare type of plutonium has been found in the crust below the deep sea, offering new clues as to how heavy metals form in star explosions and mergers. Strange hexagonal diamonds may have been ...