HOUSTON – Distant and tiny Pluto has been hiding something from Earth: another moon.
NASA 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 (4.8 billion kilometres) from Earth.
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But it is a mini-moon. It is only eight to 21 miles (33 kilometres) wide. Pluto’s biggest moon, Charon, 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
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