Landscape around the Mauna Kea Observatory in Hawaii, a double exposure made just before sunrise and later during a total Solar eclipse on 11 July 1991. Visible on the horizon are the domes of three telescopes (from left to right): Keck Observatory; Infra-Red Telescope Facility (IRTF); Canada-France-Hawaii Telescope (CFHT). The ring of light in the sky is the corona of the eclipsed Sun.