charon, pluto's moon

Charon is Pluto's only confirmed moon. It is about half Pluto's size, which makes it the largest moon relative to its parent body. It is speculated that the pair formed from one body of material that pluto and charon

This image, taken by the Hubble Space Telescope, shows Pluto (top) and Charon as two distinct objects. It is one of the best such images. Earth-based telescopes do not fully separate the pair.

broke in two early in their history. The moon orbits Pluto every 6.4 days, at a distance equivalent to Earth's diameter. Charon and Pluto spin in 6.4 days, too. This means that the same side of Pluto always faces the same side of Charon.

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