Do you know what two black holes colliding a billion light years away registers as?

It registers as a chirp. According to Scientists, Einstein’s theory of gravitational waves has finally been proven–a century later–as they found that two black holes, greater than 30 Suns each, really do exist. In fact, Einstein made a claim that these black holes created a ripple in space-time. 

Works Cited:

NPR News:

Image taken from NPR news.

http://www.npr.org/sections/thetwo-way/2016/02/12/466559439/einstein-a-hunch-and-decades-of-work-how-scientists-found-gravitational-waves