Hubble’s unexpected discovery: a new moon around Pluto - a mini-moon. It is only eight to 33 kilometres wide -
Distant and tiny Pluto has been hiding something from Earth: another moon.
NASA announced Wednesday that the Hubble Space Telescope has found a fourth mooncircling 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 4.8 billion kilometres from Earth.
But it is a mini-moon. It is only eight to 33 kilometres wide. Pluto's biggest moon, Charon, is 80 times bigger. The other two moons are Nix and Hydra.
Until astronomers decide on a name, the moon will be called P4.
http://www.thestar.com/news/world/article/1027547--hubble-s-unexpected-discovery-a-new-moon-around-plutoRead more -
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