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
27 February 2018
Powerful telescopes are ready to reveal the vast black hole at the heart of our galaxy in all its glory. This is a big moment for astronomy, says Geraint Lewis
20 December 2017
The black hole firewall paradox has been vexing physicists for years. But if quantum laws lead to the creation of other universes, the headache disappears
16 October 2017
We’ve taken the first pictures of neutron stars colliding 130 million light years away. The resulting gravitational waves may solve some big cosmic mysteries
9 October 2017
About half the normal matter in our universe had never been observed – until now. Two teams have finally seen it by combining millions of faint images into one
21 September 2017
The highest energy particles in the universe hit Earth very rarely, so it took 10 years of data to pinpoint their origin. They’re coming from galaxies far, far away
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
16 June 2017
Evidence is growing that our neck of the universe is a whole lot of nothing. This alluring idea could settle a cosmological bun fight, says Geraint Lewis
