Until 1992, Pluto and its primary moon Charon were believed to be the most distant bodies in the Solar System outside of the Oort Cloud, home to trillions of comets . Then came the discovery of 15760 Albion, followed by 15810 Arawn, 19521 Chaos, 20000 Varuna and some 2,700 other icy bodies that circle more than 2.8 billion mi. from the Sun, beyond the orbit of Neptune. Scientists suspect there are millions more. Of those, an object with the provisional designation 2014 MU69 has caught ...

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