The Special Role of Black Hole in Gravitational Waves

LIGO detected the first ever evidence of merging black holes, and it was gravitational waves that they saw. So anything that has a mass and can be accelerating around something else with a mass will create a gravitational wave. Even if I just by myself am spinning around and I'm asymmetric, I can create gravitational waves, but they're too weak to be detected. If you think about little small, hard objects, something like a black hole that's very dense and very small compared to its mass, those are the perfect targets for gravitational wave progenitors.