Shortly before leaving the Moon David Scott left a plaque in a small crater to commemorate 14 astronauts and cosmonauts who lost their lives in the pursuit of space exploration. In front of it he layed a sculpture made by the Belgian artist Paul Van Hoeydonck. The Apollo 15 crew had been thinking about a memorial for some time and triggered by the deaths of the Soyuz 1 crew they got approval by NASA Headquarters to make this beautiful gesture for both countries.

David Scott, Alfred Worden, Jim Irwin

Apollo 15 was the ninth manned mission in the United States' Apollo program, the fourth to land on the Moon and the first of long stays on the Moon, with a greater focus on science than had been possible on previous missions. At the time, NASA called it the most successful manned flight ever achieved.
  • NASA - Apollo 15 mission