Margaret Rhea Seddon, American physician and astronaut

Margaret Rhea Seddon is an American surgeon and retired NASA astronaut. After being selected as part of the first group of astronauts to include women in 1978, she flew on three Space Shuttle flights: as a mission specialist on STS-51-D and STS-40, and as a payload commander for STS-58, accumulating over 722 hours in space. On these flights, she built repair tools for a US Navy satellite and performed medical experiments.