Binary neutron stars are a system of two neutron stars orbiting around a common center of mass. Neutron stars are extremely dense, compact objects formed from the remnants of massive stars that have undergone supernova explosions. When two neutron stars are in a binary system, they can emit gravitational waves as they orbit around each other, which can be detected by gravitational wave observatories such as LIGO and Virgo. Studying binary neutron stars can provide insights into fundamental physics, such as the behavior of matter under extreme conditions, the measurements of gravitational waves, and the evolution of binary systems. These systems are also thought to be the progenitors of short gamma-ray bursts, which are some of the most energetic events in the universe. Research on binary neutron stars involves theoretical modeling, observational studies, and simulations of their dynamics and interactions. Studying these systems can help scientists better understand the properties of neutron stars, the formation of compact binary systems, and the nature of gravitational waves.