Pluto’s moons have been tracked closely for the first time, showing that they tumble unpredictably rather than keeping one face fixed on their host planet. Astronomers also observed that Pluto, whose status was downgraded to a dwarf planet in 2006, might be better regarded as a binary dwarf

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Submitted June 04, 2015 at 07:04AM by madam1 http://ift.tt/1FvcUbt