Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why Pluto isn't a planet.

The James Webb Space Telescope (JWST), operated by NASA, has uncovered intriguing new details about Charon—Pluto’s largest ...

While the IAU hasn’t reversed its decision, the debate continues and some planetary scientists still call Pluto a planet. Phoenix parks debut $1M in art that doubles as shade.

Pluto's status has been a heated debate for decades with arguing over a dwarf planet classification. Here's what international standards say in 2023.

A single day on Pluto is as long as 6.9 Earth days. Tomorrow, Feb. 18 is Pluto Day. You may ask yourself why Pluto has its own day since it is no longer considered a planet of our solar system.

This post was updated April 2 at 8:41 p.m. April Fools’ Day or not, “Big Planet Energy” radiated throughout Bruin Plaza as a few dozen Pluto TV staff and community members celebrated the ...

When did Pluto stop being a planet, and why? Pluto was always in a tough spot when it came to being a planet. Just 1,477 miles across, it's only one-fifth the diameter of Earth.

T he James Webb Space Telescope (JWST) has discovered that a hazy sky over frozen Pluto is helping to cool the dwarf planet's atmosphere, while at the same time giving methane and other organic ...

Though Pluto has formally been considered a dwarf planet for almost two decades, it still has many lessons left for planetary scientists — including hints about how the solar system formed.

Pluto, therefore, is not the gravitationally dominant object in its neighborhood — and thus, not a planet, according to the new definition. Sign up for the Live Science daily newsletter now ...