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James W. Christy
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James W. Christy

American astronomer

Learn about this topic in these articles:

discovery of Charon

  • Charon
    In Charon

    …on June 22, 1978, by James W. Christy and Robert S. Harrington at the U.S. Naval Observatory station in Flagstaff, Arizona. Its diameter—1,208 km (751 miles)—is a little more than half that of Pluto, and its mass is more than one-tenth of Pluto’s mass. Charon is so large and massive…

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  • Pluto
    In Pluto: Discoveries of Pluto and its moons

    …images were being recorded by James W. Christy and Robert S. Harrington in an attempt to obtain more-accurate measurements of Pluto’s orbit. The new satellite was named after the boatman in Greek mythology who ferries dead souls to Hades’ realm in the underworld.

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