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This Tiny Celestial Body Past Pluto Shouldn't Have an Atmosphere—but Astronomers Say They May Have Detected One
如此小而遥远的世界被认为太冷,并且表面重力太小,无法容纳气体。但研究结果表明,太阳系外围的冰冷岩石物体比我们想象的更具活力