As astronomers continue discovering unusual worlds beyond our solar system, many say the question that divided scientists in ...

The spacecraft is currently approaching the outer boundary of the solar system as it prepares to cross into interstellar space.

A 24-year-old observatory assistant from the Midwest discovered Pluto. Clyde Tombaugh, born in 1906 in Streator, Illinois, grew up fascinated with the solar system. A self-taught astronomer, he built ...

On the 20th anniversary of Pluto’s infamous demotion, Mike “Pluto Killer” Brown explains why any reversal of that decision would be driven more by nostalgia than science ...

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

It's been 20 years since Pluto was declassified as the ninth planet in our solar system, and many people wish it had never lost its status. A recent comment from NASA Administrator Jared Isaacman ...

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

Pluto just picked up a powerful ally: the head of NASA. Testifying before a Senate panel on the 2027 NASA budget Tuesday, Administrator Jared Isaacman made clear he wants the icy world reinstated as a ...

For decades, Pluto remained one of the most mysterious objects in our solar system, until July 14, 2015, when NASA's New Horizons spacecraft became the first mission to visit it up close, capturing ...

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 ...