Two decades ago, the International Astronomical Union—which defines and names celestial bodies—redefined the criteria for being a planet, putting Pluto into the new category of dwarf planet ...

The head of NASA says maybe Pluto is a planet after all. He is wrong because Pluto is part of the rest of the solar system ...

Is Pluto a planet? NASA Administrator Jared Isaacman told Congress on Tuesday that Pluto should be recognized as a planet, 20 years after its status changed.

Current NASA head Jared Isaacman, himself something of a controversial choice, is determined to get Pluto reclassified as a ...

Pluto has long been one of the most debated celestial bodies in our solar system. Once classified as the ninth planet, it was redefined in 2006 as a dwarf planet, a decision that still sparks ...

NASA chief Jared Isaacman said at a US Senate hearing that he supports restoring Pluto's status as a planet after a controversial 2006 demotion.

NASA's new chief wants to reinstate Pluto as a planet. And scientists are on board – as long as you're also okay with having ...

Add Yahoo as a preferred source to see more of our stories on Google. Guests visting the Lowell Observatory in Flagstaff, Arizona during the I Heart Pluto Festival gaze at celestial objects from the ...

At a recent Senate hearing on NASA’s 2027 budget request, NASA’s Administrator Jared Isaacman made a comment that reopens a question many in the scientific community had considered closed: should ...

It's long been a question that has divided many scientists - is Pluto a planet or not? First discovered nearly 100 years ago, Pluto was known as the ninth planet in our solar system for decades. But ...

He also said that NASA is working on research papers that they would like to bring forward within the scientific community to revisit the discussion.