New research shows there is at least a 40% chance of the existence of Planet Nine, but scientists are still looking for definitive proof.

File photo: Artist's impression of the eight current planets of the solar system. In 2006, Pluto lost its erstwhile status as the solar system's ninth planet and was reclassified as a dwarf one.

Artist's impression of Planet Nine – a suspected “wide-orbit” planet – with the Sun in the distance; Neptune's orbit is shown ...

Computer simulations show that planets could be flung out of the inner solar system, supporting the possible existence of a ...

Planet Nine is a hypothetical planet, first theorised by astronomers from California Institute of Technology (Caltech) back in 2016. Said to have a mass about five to 10 times that of Earth, this ...

But even if it doesn't spot Planet 9 directly, the Rubin Observatory might find some more minor planets, ones whose orbits might be affected by Planet 9. And that could provide additional evidence ...

A stunning photo taken in Somerset has showed every single planet in the solar system at the same time during a rare alignment that won't happen again until 2040.

A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is hidden in our solar system. Search Query Show Search. HOME.