Paul Joseph Weitz (born July 25, 1932), (Capt, USN, Ret.), is a retired American naval officer and aviator, aeronautical engineer, test pilot, and former NASA astronaut, who flew into space twice. He was a member of the three-man crew who flew on Skylab 2, the first manned Skylab mission. He was also Commander of the STS-6 mission, the first of the Space Shuttle Challenger flights.