7. The LISA mission is underway to build a space-based detector for gravitational waves at the 0.1hz region, whereas LIGO is sensitive around the 500hz region. 500hz corresponds to inspiraling stellar mass black holes. 0.1hz corresponds to inspiraling supermassive black holes. Think about the most powerful subwoofer the laws of physics allow, given the maximum amount of mass density in a volume and the speed of light.
7. The LISA mission is underway to build a space-based detector for gravitational waves at the 0.1hz region, whereas LIGO is sensitive around the 500hz region. 500hz corresponds to inspiraling stellar mass black holes. 0.1hz corresponds to inspiraling supermassive black holes. Think about the most powerful subwoofer the laws of physics allow, given the maximum amount of mass density in a volume and the speed of light.
https://en.wikipedia.org/wiki/Laser_Interferometer_Space_Ant...