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Who discovered Charon?
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Pluto
Pluto as observed by the New Horizons spacecraft, July 13, 2015.
Charon was discovered on June 22, 1978, by astronomers James W. Christy and Robert S. Harrington.12
The discovery was made using photographic images of Pluto recorded at the U.S. Naval Observatory station in Flagstaff, Arizona. The astronomers were attempting to obtain more accurate measurements of Pluto's orbit when they identified the moon as an unresolved bump on the side of the dwarf planet.12