1. Leader of Irish independence movement Michael Collins was an Irish revolutionary killed during the Irish civil war in 1922.
2. Astronaut Michael Collins was an astronaut in the Gemini and Apollo space programs.
He flew on the Apollo 11 mission, the first lunar landing. On this mission Collins was the Command Module pilot who orbited the moon while his colleagues Neil Armstrong and Buzz Aldrin landed and walked on the lunar surface.
He wrote a book, Carrying the Fire [ISBN 1885283148], about his experiences as an astronaut.