Existence of gravitational waves

 

One hundred years after Albert Einstein predicted the existence of gravitational waves, they have been detected directly.

In a highly anticipated announcement, physicists with LIGO revealed today, on 11 February, that their twin detectors have heard the gravitational ‘ringing’ produced by the collision of two black holes about 1.3 billion light-years from Earth.

This means we now have a new tool for studying the Universe. For example, waves from the Big Bang would tell us a little more about how the universe formed.
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