Apollo 15 spacewalk, August 1971. The Apollo 15 mission to the Moon took place from 26 July to 7 August 1971. At left, US astronaut Alfred M. Worden, command module pilot, is outside the spacecraft during a period of trans-Earth extravehicular activity (EVA). This photograph was taken from a frame of motion picture film exposed by the 16mm Maurer camera mounted in the hatch of the Command Module (CM). During his EVA, Worden made an inspection of the Service Module (SM)'s Scientific Instrument Module (SIM) bay and retrieved the film cassettes from the Panoramic Camera and the Mapping Camera. The SIM bay holds eight orbital science experiments. This EVA took place when the spacecraft was on its way back to Earth from the Moon. Photographed on 5 August 1971.