The first ever detection of gravitational waves
![](http://ahead.astro.noa.gr/wp-content/uploads/2016/02/GW.png)
The first ever direct detection of gravitational waves was announced on 11th of February. Gravitational waves are ripples in space-time that occur under certain circumstances, for example when two very compact celestial objects like neutron stars or black holes merge. The detection was made about a century after Albert Einstein predicted their existence.