Wow. Very cool stuff.
A new planet-like object has been found circling the Sun more than one and a half billion kilometres beyond Pluto.

Quaoar, as it has been dubbed, is about 1,280 kilometres across (800 miles) and is the biggest find in the Solar System since Pluto itself 72 years ago.

The object is about one-tenth the diameter of Earth and circles the Sun every 288 years.
This bit was especially interesting to me:
However, Quaoar is not an official name - at least not yet. In a few months, the International Astronomical Union, astronomy's governing body, will vote on it.
I cast my vote for Mondas.

OK, if you're not a Doctor Who fan, it's a reference to the story The Tenth Planet .

Full story is here.