Multi-messenger constraints on Neutron Stars

The first binary neutron star merger detected in gravitational waves, GW170817, was additionally observed across the electromagnetic spectrum in the most ambitious follow-up campaign in the history of astronomy. I will discuss ways in which the electromagnetic counterparts of a binary neutron star merger can provide invaluable insight into the merger remnant's fate. Combined with inferences from the gravitational wave signal, novel constraints can be placed on the equation of state of dense neutron-rich matter, heralding the dawn of multi-messenger science. I will review major successes and lessons from GW170817, and discuss prospects for future multi-messenger observations of binary neutron star mergers.