Source with many more images: Dreams of Space - Books and Ephemera: L’Espace (1962)

Guillot, René. Illustrated by Giannini. L’espace: Encyclopédie en couleurs.
Geneve: Hachette. (100 pp.) 1962

Originally printed in French this has a number of beautiful painting of the planets adn of proposed manned exploration.

I think the first good quality upload (with more vibrant colors) is from: 1965 on the Moon | Take a BIG look! | one size fits all | Flickr