The Soviets had originally announced that the launch as a successful sub-orbital test of the new Energia booster with a dummy payload, but some time later it was revealed that the flight had, in fact, been intended to orbit the Polyus, a UKSS military payload. The two stages of the Energia launcher functioned as designed, but the Polyus payload failed to reach orbit. Due to a software error in its attitude control system, the burn of the Polyus' orbital insertion motor failed to insert the payload into orbit. Instead, the payload reentered the atmosphere over the Pacific ocean.

It would seem that Polyus is the Soviet response to the project "Star Wars" launched by the American president Reagan. It was to be in fact a space combat laser station. Finally, we know very few things about this apparatus and its real use. Officially it was intended to make scientific experiments in upper atmosphere.

The capture required three EVAs: a planned one by astronaut Pierre J. Thuot and Richard J. Hieb who were unable to attach a capture bar to the satellite from a position on the [Remote Manipulator System]; a second unscheduled but identical attempt the following day; and finally an unscheduled but successful hand capture by Pierre J. Thuot and fellow crewmen Richard J. Hieb and Thomas D. Akers as Commander Daniel C. Brandenstein delicately maneuvered the orbiter to within a few feet of the 4.5 ton communications satellite. An [Assembly of Station by EVA Methods] structure was erected in the cargo bay by the crew to serve as a platform to aid in the hand capture and subsequent attachment of the capture bar.

This required extra attitude control manuevers on each orbit to prevent light leakage into the camera which would ruin the film. On 13 May it was discovered that light leakage was damaging some of the film, and the door was tested and partially closed. Some fogging of the lens was then suspected due to condensation resulting from the lower temperatures. Changes in the attitude raised the temperature of the camera and generally eliminated the fogging. Continuing problems with the readout drive mechanism starting and stopping beginning on 20 May resulted in a decision to terminate the photographic portion of the mission on 26 May.

for the large amount of information that the mission is collecting about the Earth's water cycle, including evaporation from the oceans, water vapor in the atmosphere, clouds, precipitation, soil moisture, sea ice, land ice, and snow cover on the land and ice. Additional variables also being measured by Aqua include radiative energy fluxes, aerosols, vegetation cover on the land, phytoplankton and dissolved organic matter in the oceans, and air, land, and water temperatures.

The launch marked a milestone as Mission Specialist Jerry Ross became the first human to fly in space seven times, breaking his own and other astronauts' records of six space flights.