Cosmology2026-05-072 minarXiv:2605.05679expressCosmic Orchestra Tests Dark MatterTwo heavy balls orbit on the surface of a pond. Ripples spread from them: these are gravitational waves. As the balls spiral closer, the waves carry away energy, and the ripples become more frequent.Shreyas Tiruvaskar·Chris Gordonquadrupole radiation formulano-hair theoremAlbert EinsteinBarry BarishKip Thorneblack hole mergergravitational wavesdark matterpulsarblack hole👍👎☆SimplePopularAdvanced