The Dwarf Planet Pluto

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Planet Pluto

Pluto was once considered to be the 9th planet from the Sun. In 2006, Pluto was reclassified as a dwarf planet because of its small size. This picture shows Pluto's size (the smaller planet) in comparison to the Earth.

Pluto is a relatively recent discovery. It was not discovered until 1930. Pluto is about one-fifth the size of Earth. About the size of the Earth's moon.

Pluto is quite different from the other distant planets like Jupiter, Neptune and Uranus. It is not a gas planet. It is made of mostly rock and ice.

Pluto is 5.9 billion kilometers from the Sun, and takes over 247 years to go once around the Sun. Although Pluto is usually the farthest from the Sun, its orbit is very elongated. At times, it is closer to the Sun than Neptune.

Like Neptune, Pluto is too far away to learn much about it.


Books about the Dwarf Planet Pluto

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Links to other sites about the Dwarf Planet Pluto

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Pluto http://www.windows.ucar.edu/tour/link
Pluto http://www.kidsastronomy.com/pluto.htm

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