Pluto is no longer considered a planet because it doesn't meet all the criteria set by the International Astronomical Union.

To boldly go where we were not too long ago. Legendary actor William Shatner wants President Trump to restore Pluto to ...

The performer, now 94, who is most recently lined up to receive the lifetime achievement Saturn award, was spotted at an ...

The International Astronomical Union, which reclassified Pluto as a dwarf planet in 2006, is the arbiter of such ...