STS-37 Gamma Ray Observatory (GRO) held by RMS over OV-104's payload bay

STS037-99-098 (7 April 1991) --- Backdropped against clouds over water, the Gamma Ray Observatory (GRO) is still in the grasp of the Space Shuttle Atlantis' Remote Manipulator System (RMS) in this 70mm scene. A special Extravehicular Activity (EVA) was required by astronauts Jerry L. Ross and Jerome (Jay) Apt to manually extend the high-gain antenna on GRO. The five-member crew capped off a busy Flight Day 3 by releasing the heavy payload.