Above, ten covers from the popular French thriller series Les aventures de Zodiaque, published by Éditions de Neuilly throughout the 1950s, with cover art from Aldé, aka Gaston Martineau, aka Gaston Martin.
1959—Dark Side of Moon Revealed
The Soviet space probe Luna 3 transmits the first photographs of the far side of the moon. The photos generate great interest, and scientists are surprised to see mountainous terrain, very different from the near side, and only two seas, which the Soviets name Mare Moscovrae (Sea of Moscow) and Mare Desiderii (Sea of Desire).