⏰ when
When was the first gravitational-wave signal detected?
SpaceCosmology
Quick Answer
The first direct detection of gravitational waves was made on 14 September 2015. It was announced publicly in February 2016.
The Full Story
The first gravitational-wave signal, known as GW150914, was detected on 14 September 2015 by LIGO. The discovery was announced on 11 February 2016. It came from the merger of two black holes, about 36 and 29 times the mass of the Sun. This detection opened a new way of observing the universe, allowing astronomers to study violent cosmic events through ripples in spacetime.
Key Facts
1.Detected on 14 September 2015
2.Announced on 11 February 2016
3.Source: merging black holes
YouTube Angle
Suggested video title for this topic:
"Astronomers heard the universe for the very first time."