The debate over Pluto’s planetary status has been ongoing since its reclassification as a “dwarf planet” in 2006 by the ...

On August 24, 2006, Pluto ceased to be considered a planet. A mixture of rock and ice located in the Kuiper Belt, a region of icy objects beyond the orbit of Neptune. This demotion ...

A fourth moon has been discovered in its orbit, not an easy thing to do because Pluto is not only the furthest planet from the Earth, but also has an elliptical (read "crazy") orbit. Yeah, we said it.

Today in the history of astronomy, our solar system's ninth member is downgraded to a dwarf planet.

On Aug. 24, 2006, the International Astronomical Union (IAU) decided that Pluto wasn't a planet anymore. Instead, Pluto is ...

New Horizons will also head deeper into the Kuiper Belt, an area beyond Pluto's orbit of the Sun that is the largest structure in the planetary system, with more than 100,000 miniature worlds ripe ...