Explore gravitational-wave standard sirens with electromagnetic counterparts in this 44-minute lecture by Hsin Yu Chen from MIT. Delve into the groundbreaking field of gravitational wave detection and its impact on physics, stellar evolution, and cosmology. Learn about the application of standard sirens to cosmology, tensions between different experiments, and the center siren method. Discover electromagnetic counterparts, projections for next-generation detectors, and single galaxy localization techniques. Examine the dark siren approach, methods to break degeneracies, and the challenges of measuring distances. Investigate electromagnetic observations, selection effects, and calibration uncertainties. Gain insights into binary neutron star rates, crosscorrelation techniques, and the latest results in this cutting-edge area of astrophysics.