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

How many planets are there in the Solar System? It sounds like an easy question, but it’s more complex than you might think – and actually it’s one we still can’t answer. With scientists finding evide

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

The comet dubbed 3I/ATLAS, a rare extrasolar intruder, continues to barrel through the Solar System, attracting interest and speculation from astronomers and space scientists worldwide. Harvard astron

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

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