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The three astronauts on the Skylab 4 space research mission in 1973 got behind schedule when one of them vomited before they'd even got onto the space station. They felt they were being micromanaged by ground control, and that their workload was unreasonable - and one day, all three of them missed their daily radio briefing. Some people at Nasa thought they'd gone on strike. But what really happened? Lucy Burns speaks to Dr Edward Gibson, the only surviving member of the trio, about an incident that has been misremembered as the Skylab space strike. Photo: Scientist-astronaut Edward G Gibson sailing through airlock module hatch of the Skylab, demonstrating the effects of zero-gravity, February, 1974. (Image courtesy National Aeronautics and Space Administration (Nasa)/Smith Collection/Gado/Getty Images)