Gravitational waves - the cosmic chirp

The sound of the collision from a billion light-years away is the first direct evidence of gravitational waves, the ripples in the fabric of space-time that Einstein predicted a century ago.
siftbotsays...

Promoting this video and sending it back into the queue for one more try; last queued Thursday, February 11th, 2016 10:37am PST - promote requested by eric3579.

lucky760says...

Thank goodness for this video's explanation. I kept wondering how they detected the gravitational waves and no stories explained it. The animation here was great.

Now I just wonder how they know so certainly that it was *that* 1-billion-year-old black hole collision that they detected.

Great stuff. *promote

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