In our solar system, the farther out you go from the sun the gassier things get... with the exception of dwarf planets, small rocky bodies orbiting the sun. What gives?! Let's find out on this But Why ...

Twenty years after Pluto became a dwarf planet, people are still fighting over its status. Experts explain why the debate feels so personal.

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 ...

A new formation theory for Pluto's moon Charon could explain why Pluto is geologically active. Illustration incorporates NASA New Horizons terrain imagery. Pluto — demoted to dwarf planets status in ...

February 7, 2025 Add as a preferred source on Google Add as a preferred source on Google We are less than two weeks away from the 95th anniversary of the discovery of Pluto, the ice-caked, rocky ...

NASA Administrator Jared Isaacman wants to put an end to a decades-long debate among scientists. Is Pluto a planet or not? Isaacman says it should be — but it hasn’t been one for 20 years. That’s ...

Monday marks 20 years since Pluto was considered a full-fledged planet in our solar system. For some, the sting of that cosmic demotion has never gone away. “When I give public talks and I just put up ...

In August of 2006, astronomers at the International Astronomical Union (IAU) democratically voted to reclassify Pluto as a dwarf planet — but 20 years later, with our greater knowledge and ...

Since it was stripped of planetary status, Pluto’s defenders have been fighting the decision – and they’re only getting more passionate Twenty years ago, Pluto got demoted. After a vote by the ...