Learn how a possible ninth planet, the theoretical Planet X, could have acquired its wide orbit in the outer Solar System - a ...

Simulations show that the stars’ tug could send Mercury, Venus or Mars crashing into Earth — or let Jupiter eject our world from the solar system.

After surviving the extreme, long-haul journey, you'd next have to navigate all 13 of Uranus' dusty rings - a bit like a spy dodging lasers in those classic movies. Then, you'd become the first ever ...

In the cold, dark outskirts of planetary systems far beyond the reach of the known planets, mysterious gas giants and ...

Scientists are intrigued after spotting a highly unusual celestial object lurking at the very edge of our solar system.

Astronomers have discovered a new dwarf planet, named 2017 OF201, far beyond Pluto's orbit. It takes 25,000 years to orbit ...

There’s a new object in the distant reaches of our solar system, and it might just offer clues to a long-standing cosmic ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

The International Astronomical Union’s Minor Planet Center, which catalogs new moons and other small bodies in the solar ...

Scientists have discovered a mysterious new object far beyond Neptune, and it could be one of the most distant dwarf planets ...

Infection-causing fungi responsible for millions of deaths a year will spread significantly to new regions as the planet ...

In a first, the Week 1 Brazil game will be streamed live, for free on YouTube. Check out the full list of locations and the NFL host teams/matchups below: CBS announced that the Kansas City Chiefs ...