关于这张图
AS09-20-3137 (3-13 March 1969) --- The Grand Canyon is sharply etched on the snow-covered Colorado Plateau in Arizona in this photograph from the Apollo 9 spacecraft during its Earth-orbital mission. Lake Powell behind Glen Canyon Dam is in the upper right corner. Humphreys Peak and the many volcanic craters around the San Francisco Mountains near Flagstaff, Arizona, are right of center. Prescott is under clouds at lower center.
