The overall name for the scientific instruments first deployed on the Moon by Apollo 12 astronauts Pete Conrad and Alan Bean in November 1969. The package, designed to reveal the Moon's internal structure, included an ion detector, seismometer, magnetometer, laser ranging reflector, and solar wind spectrometer. Later ALSEP packages were deployed by Apollo 14, Apollo 15, Apollo 16, and Apollo 17.

http://www.lpi.usra.edu/lunar/missions/apollo/ Describes the Apollo lunar surface experiments package (ALSEP). For each of the six Apollo missions that landed on the Moon, there are details of the experiments carried out on the lunar surface by the crew, with supporting photographs.