This photograph, taken from the Apollo 15 Lunar Module, shows the SIM (Scientific Instrumentation Module) bay in the side of the Service Module. It carried instruments to carry out large scale remote sensing of the lunar surface. Apollo 15, the fourth succesful lunar landing mision, was launched on 26th July 1971. It carried astronauts David Scott, James Irwin and Alfred Worden. Worden remained in lunar orbit in the Apollo Command Module while the other two astronauts descended to the Moon, becoming the seventh and eighth men to walk on its surface. Apollo 15 was the first mision to use the battery powered Lunar Rover, which considerably increased the distances that astronauts could cover while exploring the lunar surface.
© National Aeronautics & Space Administration / Science & Society