GW150914
GRAVITATIONAL WAVES · the first chirp
The day a new sense opened. On September 14, 2015, the LIGO detectors felt spacetime itself tremble: a ripple from two black holes that had spiraled together and merged 1.3 billion years ago. In the final fraction of a second, the collision radiated more power than all the stars in the observable universe combined. Converted to sound, the signal makes a little chirp.
🚀 Fly there in the 3D universe