Stargazer – The first successful space telescope in Earth orbit

Stargazer – The first successful space telescope in Earth orbit

The Orbiting Astronomical Observatory 2, launched on December 7, 1968.

An Atlas-Centaur rocket launched it into a nearly circular 750-kilometre altitude Earth orbit. Data was collected in ultraviolet on many sources including comets, planets, and galaxies. It had two major instrument sets facing in opposite directions; the Smithsonian Astrophysical Observatory and the Wisconsin Experiment Package.

One discovery was large halos of hydrogen gas around comets, and it also observed Nova Serpentis, which was a nova discovered in 1970.

Technicians in a clean room at NASA’s Kennedy Space Center in Cape Canaveral, Florida, check out the Orbiting Astronomical Observatory 2 before the mission’s Dec. 7, 1968, launch. The white conical structures visible near the top of the spacecraft are two of its six star trackers, small telescopes that lock onto appropriate guide stars to keep the instruments on target.
/ Image: NASA
OAO-2 Stargazer / Image:

Featured Image: The Orbiting Astronomical Observatory 2 (OAO-2, Stargazer) / Image: NASA



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