Country of Origin: United States of America 3-D Test: 86.4 x
63.5cm (34 x 25 in.) Metal shell, glass optics, electronics This
is an engineering model of one element of a four- telescope
array called Celescope which was half of the payload for the
second Orbiting Astronomical Satellite (OAO II), launched in
December 1968. Developed at the Smithsonian Astrophysical
Observatory, Celescope was designed to survey the entire
ultraviolet sky, looking for unusually hot sources of energy.
Each telescope contained a 12-inch Cassegrain optical system and
was equipped with a special Uvicon television tube and filters.
The data from Celescope resulted in a catalog of over 5,000
ultraviolet colors for stars. Transferred from the Smithsonian
Astrophysical Observatory. Transferred from the Smithsonian
Astrophysical Observatory