Exploring the Mysteries of Black Holes and Gravitational Waves.

New experiments like LISA will allow researchers to observe pairs of black holes for much longer before the merger takes place, potentially even for years. With these much more precise measurements, researchers can learn about the environment in which the merger occurs, including the presence of dark matter, accretion disks, or gravitational atoms. Statistical techniques can differentiate between all four scenarios, opening up the possibility of searching for new ultralight particles and dark matter candidates with gravitational waves.