Pluto news, features and articles

Now that Pluto looks to have regained the title of largest object in the outer solar system, should astronomers consider calling it a full-fledged planet again?

The dwarf planet Eris, once thought to be the largest body in the outer solar system, may actually be smaller than Pluto, observations suggest.

The frozen surface of the dwarf planet Eris looks a lot like that of its smaller neighbor Pluto, new research has found.