A powerful new observatory is the best hope yet for finding the elusive Planet 9, a large planet that some scientists say is ...

Known as Planet Nine or Planet X, it is a hypothetical planet that has long been rumoured to exist in the outer solar system. Although "several claims to have found an extra planet have been made ...

In 2016, Batygin and Brown first outlined in detail how the orbits of six of these objects could be explained by a specific Planet Nine. They predicted this world must have a mass at least 10 ...

But in recent years, astronomers have proposed that a ninth world, imaginatively nicknamed "Planet Nine," could be hiding in ...

For about a decade, he and other researchers have been trying to prove that the so-called "Planet 9" exists. So far, the only evidence has come from some oddities in the orbits of small Pluto-like ...

Take a look behind the scenes and find out how The Planets team brought the worlds of the Solar System to life. BBC Two’s The Planets features spectacular reconstructions of the most dramatic ...

28, 2025. All seven of the other planets in our solar system will be visible tonight in what’s been a really highly promoted event online. Malan is astronomy writer and presentation editor for ...