Dive into the depths of deep space with a tour of the Hanford Laser Interferometer Gravitational-Wave Observatory (LIGO). LIGO’s mission is to open the field of gravitational-wave astrophysics through the direct detection of gravitational waves. LIGO detectors use laser interferometry to measure the distortions in space-time occurring between stationary, hanging mirrors caused by passing gravitational waves. LIGO is a national facility for gravitational-wave research, providing opportunities for the broader scientific community to participate in detector development, observations and data analysis. LIGO is funded by the U.S. National Science Foundation and operated by the California Institute of Technology and the Massachusetts Institute of Technology. Transportation will be provided by BMLT.