Building blocks of theuniverse

Measuring time using the Earth’s rotation was always an imprecise business, so now we do it using the ‘tick’ of an atom

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

Amazing answers to your curious questions

Using Webb, researchers detected several complex carbon-based molecules ...

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

It’s difficult to know for sure how many electrons are in the Universe. British physicist Arthur Eddington (1882–1944) came up with a number in 1938, now known as the ‘Eddington number’. Eddington’s c