The electromagnetic spectrum

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

The tech revolution that manipulates the subatomic world

Our understanding of the Universe has revealed that its existence, and indeed our own, relies on a particular set of rules. For example, the fundamental ‘constants of nature’, such as the charge of th

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?