Merging black holes
![](https://cdn.sci.esa.int/documents/33682/35393/1567215438931-ESA_INTEGRAL_MergingBlackHoles_625.jpg)
Date: 30 March 2016
Satellite: INTEGRAL
Copyright: ESA–C.Carreau
Artist's impression of two black holes as they spiral towards each other before merging, releasing gravitational waves – fluctuations in the fabric of spacetime.
Last Update: 1 September 2019