Devon Keogh

A History of Gravitational Waves

14th September 2015. A 4 kilometer long arm forming part of the Laser Interferometer Gravitational-Wave Observatory (LIGO) changed its length by one ten-thousandth the width of a proton, due to a distortion in spacetime, disturbing a laser beam housed inside. Computers immediately detected the mind bendingly miniscule change, sending an automatically generated email containing the observed data to a postdoctoral researcher by the name of Marco Drago working in the Max Planck Institute for Gravitational Physics in Hannover, Germany. Marco’s job was to monitor LIGO readings examined the data to rule out any error or “dummy signal” used for testing purposes. Within a few days news of the detection had been leaked to the world astrophysics community and after the observation had been definitively confirmed an official press conference on the 11th of February 2016 revealed to the world the first observation of a gravitational wave on earth by LIGO.