LIGO / CALTECH / MIT / SCIENCE PHOTO LIBRARY LIGO / CALTECH / MIT / SCIENCE PHOTO LIBRARY
Gravitational wave detection signals. Graphs showing the data from the gravitational wave signal detected on 4 January 2017 (signal GW170104). The graphs show the strain (bottom) and frequency variation (top) in the detectors, which indicates the presence of a gravitational wave from colliding black holes. The detection was made by the LIGO (Laser Interferometer Gravitational-Wave Observatory) gravitational wave detector laboratories in Hanford, Washington, USA, and Livingston, Louisiana, USA. The graphs show the actual signals (orange and blue) and the predicted model signal (black line). Gravitational waves are ripples in the curvature of spacetime. They were predicted by Einstein in 1916, and remained undetected for a century.
Model release not required. Property release not required.