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
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
29 July 2020
A faint fuzzy glow around the first black hole image last year baffled astronomers. Now we know what it contains – and it’s more bizarre than we ever imagined
22 July 2020
A century ago, we missed the loose threads that told us our picture of the universe would unravel. Let’s not be so complacent now, says cosmologist Dan Hooper
3 June 2020
Nobel prizewinner Jim Peebles introduced dark matter and dark energy into our standard model of the cosmos – but that is only an approximation to a deeper truth, he says.
28 May 2020
Black holes exert a powerful pull on our imagination, but their weirdness starts way before you cross the event horizon, says astrophysicist Chris Impey
20 May 2020
Cosmologist Katie Mack spends her days pondering the end of everything. Whether the cosmos dies a slow heat death or winks out of existence tomorrow, she finds it helps put everyday troubles in perspective
8 April 2020
Strange particles observed by an experiment in Antarctica could be evidence of an alternative reality where everything is upside down
11 December 2019
It certainly wasn’t big, and probably didn’t bang – and the surprises in the conventional story of the universe's origins don’t end there
9 October 2019
Exotic primordial black holes born in the moments after the universe began could be the key to solving some of cosmology’s biggest problems… if only we can find them.
