Great Scott (lunar sample)

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Lunar Sample 15555, better known as "Great Scott", is a lunar sample discovered and collected on the Apollo 15 mission in 1971.

Apollo 15 mission commander David Scott collected Lunar Sample 15555 in the Hadley-Apennine region of the Moon, on the rim of Hadley Rille at Station 9A. The large sample was soon nicknamed "Great Scott", referring to its large size and its discoverer.

The rock is a 9.614 kg (21.20 lb) olivine-normative basalt. It is the largest sample returned to Earth from the Apollo 15 mission, and the most intensively studied.

The term Great Scott was in use as soon as the next mission, Apollo 16, because Charlie Duke used the term just before picking up a lunar sample nicknamed Big Muley. Big Muley is the largest sample (11.7 kg) returned from the Moon; Great Scott is the second largest.

Great Scott is currently stored at the Lunar Sample Laboratory Facility at the Lyndon B. Johnson Space Center.

Pieces of it are on display at the National Museum of Natural History in Washington, D.C., the Tellus Science Museum in the state of Georgia, the Madrid Deep Space Communications Complex in Spain, the LROC Lunar Exploration Museum at Arizona State University^[1] and the Science Museum in London, England.^[2]