George was selected as an astronaut candidate by NASA in January 1978. He flew as a scientific equipment operator in the WB-57F earth resources aircraft and served as the Astronaut Office representative in the Space Shuttle Extravehicular Mobility Unit (space suit) development effort. During STS-1 he was the photographer in the prime chase plane. He also served as support crewman and CAPCOM for the last two OFT flights, STS-3 and STS-4, and as head of the Astronaut Office Mission Development Group. A veteran of three space flights, Nelson served aboard STS-41-C in 1984, STS-61C in 1986 and STS-26 in 1988. He has logged a total of 411 hours in space, including 10 hours of EVA flight time.[3]
This was a seven-day (April 6–13, 1984) mission during which the crew successfully deployed the Long Duration Exposure Facility (LDEF), retrieved the ailing Solar Maximum satellite, repaired it on board the Orbiter, and replaced it in orbit. The mission also included flight testing of Manned Maneuvering Units (MMUs) in two extravehicular activities (EVAs), and operation of the Cinema 360 and IMAX Camera Systems. Nelson performed EVAs in support of the satellite retrieval and the MMU testing.[5]
This mission (September 29–October 3, 1988) was the first flown after the Challenger accident. During the four-day flight, the crew successfully deployed the Tracking and Data Relay Satellite (TDRS-C) and operated eleven mid-deck science experiments. The mission completed 64 orbits of the Earth and landed on October 3, 1988.[7]
Post-NASA career
Nelson left NASA in June 1989, became an assistant provost at the University of Washington,[8] and now directs the Science, Mathematics and Technology Education program at Western Washington University in Bellingham. He is also the principal investigator of the North Cascades and Olympic Science Partnership, a mathematics and science partnership grant from the National Science Foundation.[9] Nelson served as faculty on the Fall 2013 Semester at Sea voyage, where he taught introductory astronomy and celestial navigation.[10]