How Many Black Hole Collisions Have You Heard?

Gravitational waves are like ripples in space and time itself. Since 20 15, we've seen a whole bunch of these black wholl collisions. We have mike 50 examples now. And to appreciate how amazing that is, realize that we didn't know how often black holes collided. When lago turned on, it was like a new kind of instrument. And were listening to something new in the universe,. It's all just an analogy, because gravitational radiation is not something you see or hear. Whe as tring to translate it into a sort of human experience.