The James Webb Space Telescope (JWST) has discovered that a hazy sky over frozen Pluto is helping to cool the dwarf planet's ...

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.

How disappointing that long before New Horizons got there in 2015, Pluto had become an ex-planet. But just as planets can be lost, they can also be found. And I’m hoping for a Pluto replacement.

Michael Brown doesn’t care how much you love Pluto. He loves it too, but that didn’t stop him from leading the charge in 2006 to strip it of its “planet” designation and bust it down to a ...

Planet 9: Astronomer Mike Brown's daughter told him to find new planet after he 'killed off Pluto' 'She said ‘Daddy, what you need to do is go find a new planet so that people will no longer be ...

On Aug. 24, 2006, nine years ago today, the International Astronomical Union demoted Pluto from a planet to a dwarf planet — a move that sparked protests and split the space-science community ...

Last year, astronomers suggested that a gigantic planet, dubbed Planet 9, might be lurking on the fringes of the Solar System. Now researchers claim that weirdly wobbling objects in the Kuiper ...

Pluto was discovered by American astronomer Clyde Tombaugh in 1930, after a long search for an unseen “planet X” beyond Neptune that was thought to be disrupting the orbits of the giant planets.

The solar system may have a ninth planet after all. This one is 5,000 times bigger than outcast Pluto and billions of miles farther away, say scientists who presented "good evidence" for a long ...