Pluto may have lost its status as a full-fledged planet in 2006, but that doesn't mean it's a joke of a world this April Fools' Day and the folks behind Pluto TV want to make that clear.

A single day on Pluto is as long as 6.9 Earth days. Tomorrow, Feb. 18 is Pluto Day. You may ask yourself why Pluto has its own day since it is no longer considered a planet of our solar system.

Pluto has never been much of a planet — small, wired orbit, not much atmosphere — and questions about its status have been raised periodically since its discovery 76 years ...

This definition would mean Pluto, whose status has been questioned for years, would retain its place in the list of known planets. However, Pluto isn't the only object in the solar system that ...

One thing is clear, however: Pluto's status is not determined by the president. The International Astronomical Union, which reclassified Pluto as a dwarf planet in 2006, is the arbiter of such ...

Bring up the former planet Pluto in conversation and you’re guaranteed to be met with a strong opinion. In one camp are those ...

According to the IAU, a dwarf planet is as related to a planet as an asteroid is -- not at all. This hard definition has been drawing criticism since the IAU demoted Pluto in a 9-8 vote in 2006.

Pluto was the little planet that could — until it couldn’t. Discovered in 1930 at Lowell Observatory in Flagstaff, Arizona, Pluto was hailed as the ninth planet in our solar system.

You grew up learning about the nine planets, then all of the sudden there’s eight." Pluto was discovered in 1930 by astronomer Clyde W. Tombaugh at the Lowell Observatory in Flagstaff, Arizona.