Lunar Sample 15555, better known as "Great Scott", is a lunar sample discovered and collected on the Apollo 15 mission in 1971 in the Hadley-Apennine region of the Moon.
The rock is a 9.614 kg (21.20 lb) olivine-normative basalt.
[1] It was collected by Scott on the rim of Hadley Rille, at station 9A.
[2] 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, DC, 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[3] and the Science Museum in London, England.