WORLDKINGS - On This Day - April 08, 2022 - OAO 1, 1st orbiting astronomical observatory, launched in 1966

07-04-2022

(Worldkings.org) The Orbiting Astronomical Observatory (OAO) satellites were a series of four American space observatories launched by NASA between 1966 and 1972, which provided the first high-quality observations of many objects in ultraviolet light.