The gravitational wave detected on 15 September 2015 came from merging EODFN KROHV WKDW EULH \ HPLWWHG WLPHV WKH power of all the stars in the Universe combined
In a galaxy far, far away, at a time when Earth boasted nothing more complex than a bacterium, two monster black holes were locked in a death spiral. One was 29 times the mass of the Sun, the other 36 times the mass of the Sun. Each travelling at half the speed of light, they whirled about each other one last time. As they coalesced, three whole solar masses were destroyed and converted into gravitational waves. Bear in mind that an atomic bomb converts only about a kilogram of mass-energy into other forms. Had the tsunami of tortured space-time that surged outwards been in the form of light, it would have shone tens of times brighter than a Universe of stars.
Einstein’s theories predicted gravitational waves too, but it took a hundred years for us to detect them