Since it was stripped of planetary status, Pluto’s defenders have been fighting the decision – and they’re only getting more passionate ...

A 24-year-old observatory assistant from the Midwest discovered Pluto. Clyde Tombaugh, born in 1906 in Streator, Illinois, ...

Pluto lost its planethood for a very specific reason. Whether or not that’s a good reason depends on who you ask.

Learn how Pluto nearly kept its planet status in a proposed 12-planet Solar System as its demotion marks its 20th anniversary ...

Those who supported Pluto’s demotion included Neil DeGrasse Tyson ...

Dark streaks along Pluto’s giant nitrogen glacier may mark places where liquid nitrogen recently reached and flowed across the surface. Computer models suggest nitrogen could melt beneath the ...

Twenty years after Pluto lost its planetary status, the debate continues as scientists still disagree over what defines a ...

New analysis of decade-old images from NASA's 2015 New Horizons encounter with Pluto has turned up evidence of recent liquid ...

On the 20th anniversary of Pluto’s infamous demotion, Mike “Pluto Killer” Brown explains why any reversal of that decision ...

Unpopular opinion time, Pluto being reclassified as a dwarf planet was a great thing for our understanding of the solar ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. New information about Pluto's largest moon that was revealed by a NASA ...

Forbes contributors publish independent expert analyses and insights. Amanda Kooser covers the quirky side of science and space. Pluto has five moons, but Charon stands out from the rest. Charon is ...