Astronomers are now regularly detecting planets thousands of light years from Earth – but have we missed one in our own Solar System?

An artist’s impression of Cha 1107-7626 accreting material ...

As an astronomer, I collect stars. There are several hundred billion of them in our Galaxy, the Milky Way, so it’s important to find a way to categorise them. While others might rank their stars by co

Amazing answers to your curious questions

Projecting our consciousness into other bodies and walking on alien worlds might not be such a far-flung concept

Although it’s by no means certain, scientists are slowly accumulating evidence that life once existed on the Red Planet