Former ‘10th planet’ officially named Eris
A distant, icy rock whose discovery shook up the solar system and led to Pluto's planetary demise has been given a name: Eris.
The christening of Eris, named after the Greek goddess of chaos and strife, was announced by the International Astronomical Union on Wednesday. Weeks earlier, the professional astronomers' group stripped Pluto of its planethood under new controversial guidelines.