The prevailing Nobel Prize-winning theory that the Universe is expanding at an ever-accelerating rate due to the unseen influence of dark energy has been called into question by a new study. Astronome

How do astronomers currently think the Universe is expanding? Astronomers have long believed the Universe is expanding at an accelerating rate, driven by what we call ‘dark energy’. This led to a mode

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

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

The question of how black holes grow should be an easy one to answer: they absorb material from their surroundings. But despite their fearsome reputation, supermassive black holes don’t rampage throug

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