Among the best known university observatories are the Harvard-Smithsonian Center for Astrophysics; the University of California’s Lick Observatory; the California Institute of Technology’s Palomar Observatory, and Keck Telescopes (in collaboration with the University of California); the telescopes on Mauna Kea, Hawaii, and Mees Solar Observatory on Maui, operated in part by the University of Hawaii; and the University of Arizona’s Steward Observatory, Arizona Radio Observatory, and Mount Graham International Observatory.