The planet - a giant lump of rock and ice, more than nine billion miles from the Sun ... Meet Xena, the first new planet to be found in our solar system since Pluto. Sunday 31 July 2005 00:00 BST.

PASADENA, Calif. – Few planet hunters stand to gain as much as Michael Brown if our solar system balloons to 12 planets under a new definition. He's spotted more than a dozen objects that might ...

The dwarf planet formerly known as Xena received a new name Thursday, while Pluto was given a number to reflect the loss of its status as a planet. Michael Brown, a professor of planetary ...

The astonishing find has reignited the debate about what properties an object has to possess in order to be classed as a planet. In Xena's favour is its size. With a diameter of perhaps 2,800km (1,700 ...

Will Xena become 10th planet, or will Pluto be demoted? Alicia Chang Associated Press. Los Angeles ... Should this newly found icy rock known as "2003 UB313" become the 10th planet?

Pluto has been voted off the island. The distant, ice-covered world is no longer a true planet, according to a new definition of the term voted on by scientists today. "Whoa! Pluto's dead," said ...

AS EVERY school pupil knows, there are nine planets circling the Sun - but that may no longer be the case in a few days time.

Poor Pluto. On August 24, 2006 at the International Astronomy Union (IAU) General Assembly the ninth planet was scrubbed only 76 years after its discovery. Even weirder is that it actually got ...

2003 UB313, aka 'Xena,' whose discovery led to Pluto's demotion from planet status, officially renamed 'Eris' after Greek goddess of discord.