Gravitational Waves


                Waves LIGO

Gravitational waves are disturbances in the curvature of spacetime, generated by accelerated masses,
that propagate as waves outward from their source at the speed of light.
They were proposed by Henri Poincaré in 1905
 and subsequently predicted in 1916 by Albert Einstein on the basis of his general theory of relativity.
On 11 February 2016, the LIGO and Virgo Scientific Collaboration announced
they had made the first direct observation of gravitational waves.
The observation was made five months earlier, on 14 September 2015,
using the Advanced LIGO detectors. The gravitational waves originated from a pair of merging black holes.