STS-51-F Space Shuttle Challenger

The Solar Optical Universal Polarimeter (SOUP) experiment is visible among the cluster of Spacelab 2 hardware in the cargo bay of the Space Shuttle Challenger, with a variety of components of the instrument positioning system (IPS) visible at the centre of the frame, and the remote manipulator system (RMS) arm in its stowed position to the right of the frame, during STS-51-F, formerly STS-26 (and also known as Spacelab 2), 29th July to 6th August 1985. The primary payload was the Spacelab 2 laboratory module.