#OTD in 2015, LIGO detected wiggles in space-time from a pair of merging black holes. This event, called GW150914, created a new black hole and ushered in the first direct detection of gravitational waves, a new type of signal astronomers can study. https://go.nasa.gov/3EFrvJ0 | NASA Universe

To celebrate the one-year anniversary of a discovery that changed the face of astronomy, this week we feature the exclusive world premiere of a new documentary. LIGO Detection reveals what unfolded behind the scenes between the detection of merging black holes on 14 September 2015, and five months later when LIGO announced it to the world. Sign up to our newsletter and find out about exclusive content like this before anyone else: https://www.newscientist.com/registration/ Read more about the di