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New but tiny moon found circling distant Pluto

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[July 21, 2011]  HOUSTON (AP) -- Distant and tiny Pluto has been hiding something from Earth: another moon.

HardwareNASA announced Wednesday that the Hubble Space Telescope has found a fourth moon circling Pluto, which had been demoted from full planet to dwarf planet. Astronomers had been looking to see if Pluto had a ring, but instead they found another object circling the dwarf planet that is 3 billion miles from Earth.

But it is a mini-moon. It is only eight to 21 miles wide. Pluto's biggest moon, Charon (SHARE-on), is 80 times bigger. The other two moons are Nix and Hydra.

Until astronomers decide a name, this moon is called P4.

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Online:

http://tinyurl.com/NASAplutomoon

[Associated Press]

Copyright 2011 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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