Capt. Ronald Ellwin Evans Jr., USN (November 10, 1933 – April 7, 1990) was an American naval officer and aviator, electrical engineer, aeronautical engineer, and NASA astronaut. As command module pilot on Apollo 17 he was one of the 24 astronauts to have flown to the Moon, and one of 12 people to have flown to the Moon without landing on it.