(July 20, 1969). Close-up of the footprint of an astronaut in lunar soil, photographed with a 70mm lunar surface camera during Apollo 11 extravehicular activity on the Moon. As astronauts Neil A. Armstrong, commanding officer, and Edwin E. Aldrin Jr, pilot of the lunar module, descended into the lunar module "Eagle" to explore the lunar region of the Sea of Tranquility, astronaut Michael Collins, pilot of the command module, remained with the command and service module "Columbia" in lunar orbit.