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Pluto At Its Best

Pluto day

This photo provided by NASA shows its New Horizons spacecraft capturing Pluto rotating over the course of a full 'Pluto day' in an unprecedented flyby in July 2015. The space agency released a series of 10 close ups of the frosty, faraway world, representing one full rotation, or Pluto day. A Pluto day is equivalent to 6.4 Earth days.