LIGO, or the Laser Interferometer Gravitational-Wave Observatory, is a large-scale physics experiment designed to detect and measure gravitational waves. These waves are ripples in spacetime caused by massive cosmic events, such as the collision of black holes or neutron stars. LIGO uses laser beams and mirrors to measure tiny changes in distance caused by passing gravitational waves. LIGO consists of two main facilities located in Hanford, Washington and Livingston, Louisiana. Each facility has two long arms arranged in an L-shape, with lasers bouncing between mirrors. When a gravitational wave passes through, it slightly alters the lengths of the arms, allowing scientists to observe these elusive phenomena and gain insights into the universe.