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Pluto

A computer enhanced image of Pluto made from Hubble Space Telescope images taken in 1994.

Pluto is the ninth planet from the sun and takes 248 years to orbit the sun once. Pluto is about 5.5 times smaller than the Earth and is about 450 times less massive. Pluto was discovered on February 18, 1930 by Clyde Tombaugh.

In Greek mythology, Pluto is another name for Hades, the king of the underworld. Pluto was the son of Cronus and Rhea.

Planetary Data
Distance from Sun Length of Day Length of Year Radius Mass
39.48 AU 153.3 days 247.92 years 1,195 km 1.3*1022 kg
Known Satellites
Name Distance from Pluto Rotational Period Orbital Period Radius
Charon 19,600 km 6.38725 days 6.38725 days 593 km

Planetary and Satellite Data: NASA's Solar System Explorer