Sedna

Rulers of the Oort Cloud

The newly discovery dwarf planet shows up as red-green-blue coloured dots. Three images, each taken about two hours apart, were combined into one. The orbit of this world may be hinting that a planet far larger than Earth also lurks in the outer solar system Photograph: Scott S Sheppard/Carnegie Institution for Science

A new dwarf planet has recently been discovered in the solar system, orbiting at about 10 light hours from our Star. This is the furthest object belonging to our planetary system that we have been able to observe.

30 March 2014