Astronomers using the Hubble Space Telescope have announced the discovery of a fifth moon orbiting the planet … err, dwarf planet … Pluto. The new body is estimated to be about 6 to 15 miles across, and orbits about 58,000 miles from Pluto. The currently leading theory of the origin of Pluto’s moons is that they are the remaining debris from a collision between Pluto and another Kuiper belt object in the distant past. Read here from the Hubble News Center.