16 March 2022
With 90 detections now under our belt, gravitational waves are solving riddles about the evolution of galaxies and missing black holes – and they could soon give us a glimpse of dark matter
31 March 2021
Hints of a hefty source of gravity beyond Pluto sparked the search for a possible “Planet Nine”. Now, some astronomers think it could instead be a black hole from the big bang, offering a rare glimpse into the early universe
30 December 2020
How big is the universe? What shape is it? How fast is it expanding? And when will it end? We answer these questions and more in our essential guide to the current state of cosmological knowledge
25 November 2020
Different measurements of the Hubble constant, the rate of space-time expansion, refuse to agree – meaning we may have to look beyond Einstein’s theories to explain the universe
19 November 2019
A 2016 experiment pointed towards the existence of an undiscovered force of nature. Now researchers say they've seen a second sign
22 August 2019
Supernovae and the big bang's afterglow give us conflicting numbers on how fast the universe is expanding. Gravitational waves could help settle things
12 July 2017
Astronomers are confident they know what the mysterious massive object at the Milky Way’s heart is – but our first direct view this year could bring a shock
