Advanced LIGO (Laser Interferometer Gravitational-Wave Observatory) is a research area focused on detecting gravitational waves in space. Gravitational waves are ripples in spacetime caused by the acceleration of massive objects, such as merging black holes or neutron stars. Advanced LIGO utilizes a network of extremely sensitive interferometers to detect these waves, allowing astronomers to study the universe in a completely new way. This research area has already led to groundbreaking discoveries and has the potential to revolutionize our understanding of the cosmos.