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.

So, forget Planet 9 as a candidate for future colonization. But why is it so difficult to find? Well, with a distance from the sun reckoned to be 10 times that of Pluto, Planet 9 would be dimmer ...

Michael Brown doesn’t care how much you love Pluto ... planet might have accreted closer in like the other planets, and then been ejected by their gravitational forces. “Planet 9 is part ...

But we can't rule out a smaller, more distant world, such as the hypothetical Planet 9 (or Planet 10 if you want to throw down over Pluto ... to a slightly different part of the sky.

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 ...

New Horizons found that the dwarf planet is bigger than previously thought, but Pluto is still tiny — about two-thirds as big as Earth's moon.

Pluto nearly fills the frame in this image from the Long Range Reconnaissance Imager (LORRI) aboard ... More NASA's New Horizons spacecraft, taken on July 13, 2015, when the spacecraft was 476,000 ...

It was that last part that got poor Pluto kicked out of the club, so until the hypothesized object has been found, it's best not to attach the label of "planet" just yet. The researchers believe ...

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 ...