We believe that at the heart of every galaxy, there lies a black hole. When galaxies merge, their black holes couple up, emitting gravitational waves. Millions of these binary black holes emit these waves, creating a low-frequency hum across the universe, like the background noise of people in a cafe.
Recently, researchers at Vanderbilt contributed towards the announcement for evidence of this gravitational wave background by building a galaxy-sized detector. In this presentation, learn about what we can learn about our universe from this result by people-watching in a cafe!