Search | New Scientist

Skip to content

Planet X artwork

Planet X: We are closing in on the solar system's new occupant

13 December 2017

Evidence for a new body perhaps the size of Neptune way out in the shadows is building – but if there is a ninth planet, it’s unlike any we have seen

Sign up to our weekly newsletter

Receive a weekly dose of discovery in your inbox. We'll also keep you up to date with New Scientist events and special offers.

Sign up