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ESA Space Science

New moon found at Pluto

21 Jul 2011, 10:00 UTC
New moon found at Pluto ESA/NASA

The NASA/ESA Hubble Space Telescope has discovered a new moon circling Pluto. P4, as it is currently called, is the smallest moon yet found orbiting Pluto, with an estimated size of 13–34 km. By comparison, Pluto’s largest moon, Charon, is 1043 km across, while Nix and Hydra are 32–113 km wide.

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