One Pluto year equals 248 Earth years. At 1473 miles in diameter—about half the width of the United States—Pluto is the ...

Learn about the recently discovered trans-Neptunian object that may eventually join Pluto as a dwarf planet, found at the ...

Pluto, humanity's favorite dwarf planet, is getting some high-profile allies. "Star Trek" actor William Shatner wants to use ...

Once the quirky underdog of our solar system, Pluto held planetary status until 2006, when it got a cosmic demotion that still stings space fans. Discovered in 1930, Pluto was the ninth planet for ...

song, Interplanet Janet. Upon the discovery of its existence in 1930, Pluto enjoyed decades of special status as one of the solar system's planets. Then, in the summer of 2006, Pluto was demoted.

This sparked debate about Pluto's status in the planetary canon, which came to a head at a 2006 meeting in Prague. That year, the IAU tasked a small committee with creating a working definition of ...

Despite the change, Pluto remains a beloved celestial body, and some astronomers still debate whether it should regain its planetary status. Yes. Clyde Tombaugh discovered Pluto on Feb. 18 ...

Elon Musk has voiced his support for reinstating Pluto's planetary status, responding to a social media prompt advocating for ...