STS-61-B was the twenty-third space shuttle mission and the second for the Space Shuttle Atlantis. The shuttle was launched for Kennedy Space Center and the shuttle deployed three communicates satellites. It also tested techniques for constructing structures in orbit. This mission marked the quickest turnaround of a shuttle, just 54 days elapsed beetween this launch and Atlantis' previous mission.
Low Earth OrbitSTS-61-A was the twenty-second space shuttle flight and ninth for Space Shuttle Challenger. It was a scientific spacelab mission funded entirely by West Germany. The payload operations were controlled from the German Space Operations Center as opposed to the regular NASA centers.
Low Earth Orbit