Fourth Pluto moon found

A fourth moon has been discovered in the orbit of the dwarf planet Pluto by researchers at a leading space science centre.

The fourth and smallest moon, with an estimated diameter between 13 and 34 kilometres, was found by scientists using the Hubble Space Telescope.

The discovery will aid a NASA mission which aims to fly through the Pluto system in 2015.

Read more at Space Telescope Science Institute