English: This animated graph plots the frequency and the signal strength of gravitational waves from a simulated dataset of galactic ultracompact binaries. Colors indicate frequencies between about 0.001 and 0.01 hertz, with lighter colors representing higher frequencies. The dashed curve represents the expected sensitivity limit of the LISA (Laser Interferometer Space Antenna) mission now being designed by ESA (European Space Agency) in collaboration with NASA for launch in the 2030s.Credit: NASA’s Goddard Space Flight Center