X-ray Satellite Launched with SAO Payload
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PrintHEAO-1, an X-ray satellite carrying an experiment developed jointly by the Smithsonian Astrophysical Observatory and the Massachusetts Institute of Technology is the first in a series of three high-energy observatories launched by the National Air and Space Museum to survey and map the X-ray sky.
Chronology of Smithsonian History
Annual Report of the Smithsonian Institution for the year 1977, p. 12
Institutional History Division, Smithsonian Institution Archives, 600 Maryland Avenue, S.W., Washington, D.C. 20024-2520, SIHistory@si.edu
August 12, 1977