John Young, the Commander of Apollo 16 pictured loading the Lunar Roving Vehicle in the FQN banner above, died on Friday. He also flew on Gemini 3, Gemini 10, Apollo 10, and was the Commander of STS-1, the first orbital Space Shuttle flight, as well as STS-9.

Just five humans remain who have walked on the surface of another planetary body: Buzz Aldrin (Apollo 11), Al Bean (12), Dave Scott (15), Jack Schmitt (17), and Charlie Duke, who also landed in Orion on Apollo 16 and spent twenty hours over three EVAs walking and driving around on the moon with Young – with a leap or two thrown in:

John Young on the Descartes Highlands, 21 April 1972; click for a larger version

“Anyone who sits on top of the largest hydrogen-oxygen fueled system in the world, knowing they’re going to light the bottom, and doesn’t get a little worried…does not fully understand the situation.”