The Keck Observatory is a world-renowned astronomical observatory located on the summit of Mauna Kea in Hawaii. It consists of two identical telescopes, Keck I and Keck II, which are among the largest optical and infrared telescopes in the world. The primary focus of research at the Keck Observatory is to study a wide range of astronomical phenomena, including the formation and evolution of galaxies, the structure of the Milky Way, exoplanets, and the nature of dark matter and dark energy. The observatory is operated by the California Institute of Technology, the University of California, and NASA.