Researchers have found a candidate for the hypothetical Planet Nine, which could be an undiscovered giant planet way out in ...

Scientists examined infrared space surveys to narrow down candidates for Planet 9. Planet 9 would be so far from the Sun that ...

The presence of another planet in the solar system could explain the odd movements of some of the bodies in the Kuiper Belt.

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

A rare and dramatic scene unfolds 140 light-years from Earth. A rocky planet, once whole, is now crumbling to dust under the ...

Astronomers may have found a candidate for Planet Nine. This planet is beyond Neptune. The finding could be the first ...

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

Astronomers using the James Webb Space Telescope have directly detected the faint glow of a planet that’s colder than any ...

Scientists have discovered a planet that is literally falling apart as it orbits its star. Located about 140 light-years from ...

The planet is "crumbling to pieces," shedding the equivalent of Mount Everest’s mass every 30.5-hour orbit and will be ...

MIT astronomers estimate a planet 140 light-years from Earth may disintegrate fully within the next 1 to 2 million years.

The trio is a rarity—and when all of its unusual traits are considered together, it is unique.