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

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 ...

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 ...

Add Yahoo as a preferred source to see more of our stories on Google. NASA chief Jared Isaacman has doubled down on his stance that Pluto is without a doubt a planet. For two decades, controversy has ...

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

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 ...

Pluto was downgraded from a planet to a dwarf planet in 2006 by the International Astronomical Union. NASA Administrator Jared Isaacman has stated his support for President Trump to take action to ...

Twenty years after Pluto lost its planet status, the debate is suddenly alive again. After a 10-year-old wrote to NASA asking ...

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 ...

On Friday, NASA released a new image of Pluto's surface, revealing the icy plains that make up part of the "heart" first spotted in earlier images. Now informally named “Tombaugh Regio” (Tombaugh ...