For years, astronomers have been searching for a mysterious ninth planet lurking in the dark outer reaches of our solar ...

The chance of a planet forming in the outer reaches of the solar system – a hypothetical Planet Nine – could be as high as 40 ...

The Vera C Rubin observatory, home to the world's most powerful digital camera, promises to transform our understanding of ...

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.

The reasoning was that Pluto's location in the far-flung Trans-Neptunian region of the solar system meant that other ... t necessarily be detectable from Earth, but it might be detectable via ...

This is an image of Ceres, the nearest dwarf planet to Earth in the solar system. A new dwarf planet extremely far from the sun may have just been discovered. Credit: NASA / JPL-Caltech / UCLA ...