LARRY LANDOLFI / SCIENCE PHOTO LIBRARY LARRY LANDOLFI / SCIENCE PHOTO LIBRARY
At 6,800 feet in altitude, McDonald Observatory atop Mt. Locke in Ft. Davis, Texas, enjoys some of the clearest and darkest skies in the continental United States. Here a crowd gathers for a public star party at the visitor center to watch the phases of a total lunar eclipse in this composite photo.
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