关于这张图
AST-27-2341 (20 July 1975) --- A near vertical view of sand dunes in the San Juan Province of Western Argentina, as photographed from the Apollo spacecraft in Earth orbit during the joint U.S.-USSR Apollo-Soyuz Test Project mission. The picture was taken at an altitude of 220 kilometers (136 statute miles) with a 70mm Hasselblad camera using medium-speed Ektachrome QX-807 type film.
