关于这张图
AST-27-2339 (20 July 1975) --- The Earth’s limb at sunrise and cloud silhouettes in the Southern Hemisphere, as photographed from the Apollo spacecraft during the joint U.S.-USSR Apollo-Soyuz Test Project mission. The photograph was taken at an altitude of 230 kilometers (143 statute miles) with a 70mm Hasselblad camera using medium-speed Ektachrome QX-807 type film.
