Backdropped against the Earth's cloud-covered surface, the Gamma Ray Observatory (GRO) with its solar array panels deployed is grappled by the remote manipulator system during STS-37 systems checkout. GRO's four complement instruments are visible: the Energetic Gamma Ray Experiment Telescope (at the bottom); the Imaging Compton Telescope (center); the Oriented Scintillation Spectrometer Experiment (top); and the Burst and Transient Source Experiment (on four corners).

Credits - NASA