LIGO
How do you tell one black hole from another?
The Event Horizon Telescope attempted to take an image of the black hole at the centre of the Milky Way, Sagittarius A*, in 2017. It was hoped that the images could be used to differentiate between different forms of gravity, but it now appears that won't be possible.
Do black holes lurk on galaxy edges?
A study that suggests populations of massive black holes lurk on the edges of spiral galaxies could have implications for the hunt for gravitational waves.
Gravitational waves detected for third time
Following its landmark detection of gravitational waves in September 2015, the LIGO experiment has continued to search for ripples in space-time caused by massive, violent events in space.
LIGO black holes born from a single star?
The news of the first ever detection of gravitational waves was a major astronomical discovery. Now a further study of the event has revealed a gamma-ray burst that could point to the origin of the black holes behind the event.
Scientists detect gravitational waves
100 years after Einstein presented his theory of general relativity to the world, the presence of gravitational waves has been detected for the first time.