Large Surface Light Collector at Mt. Hopkins Observatory
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(Left to right) Tucson mayor Jim Corbett, Smithsonian Astrophysical Observatory Director Dr. Fred Whipple (1955-1973), and Rep. Morris K. Udall (D-AZ) stand in front of a 34-foot gamma-ray collector at the Smithsonian Astrophysical Observatory, Mt. Hopkins, Arizona. The large surface light collector, really a mosaic of 252 polished glass mirrors, searches for sources of gamma-ray radiation in the heavens, a feat never attempted before from a ground-based observatory.
Smithsonian Institution Archives, Record Unit 371, Box 02, Folder: May 1974, Image No. 92-1773
Smithsonian Institution Archives Capital Gallery, Suite 3000, MRC 507; 600 Maryland Avenue, SW; Washington, DC 20024-2520
SIA RU000371 [92-1773]
Gelatin silver prints; 5 x 5;