Tags: space, scientist-astronaut, harrison, schmitt, heads, selected, rock, lunar, surface, retrieve, sample, study, credit, eugene, cernannasa
Tags: space, scientist-astronaut, owen, garriott, skylab, science, pilot, seen, performing, apollo, telescope, mount, station, cluster, earth, orbit, photographed, hand-, held, hasselblad, camera
Tags: space, scientist-astronaut, harrison, schmitt, standing, huge, split, lunar, boulder, third, apollo, extravehicular, activity