The planet - a giant lump of rock and ice, more than nine billion miles from the Sun - is the first to be discovered since Pluto in 1930. The breakthrough will cause the redrawing of the maps of ...

Caltech astronomer Michael Brown, whose discoveries have forced reappraisal of solar system, thinks neither 'Xena' nor Pluto qualify as planets.

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 ...

Press Release Xena Awarded “Dwarf Planet” Status, IAU Rules; Solar System Now Has Eight “Classical” Planets by SpaceRef August 24, 2006 ...

Jupiter could be labeled a "gas giant planet," while Pluto and Xena could be "ice dwarf planets." The number of recognized planets in the solar system has seesawed based on new findings.

Xena, the possible 10th planet in our solar system, has its own moon, a dim little satellite called Gabrielle, its discoverers say.

"Frozen Planet: A World of Ice and Wonder takes you on an awe-inspiring journey through the breathtaking landscapes and unique wildlife of the polar regions. Discover the intricate ecosystems and ...

The heated debate over what constitutes a planet has reignited following last week’s confirmation that the most distant planet-like object object ever seen in the solar system is larger than ...

There are many scientists who believe that both Xena and Pluto are merely two largish objects in a huge population of rock-ice bodies orbiting the Sun in the far-distant region of the Solar System ...

Is Pluto a planet? It’s been one of astronomy’s most controversial questions since August 24, 2006. Here's what happened and why.