Illustrations from a book I found at a bazaar in Bishkek, Kyrgyzstan: небо земли (The Sky of the Earth), a history of astronomy for children written in 1974 by A. Tomilin, with illustrations by T. Obolensky and B. Starodubzeva.
More to come from this goldmine of beauty! And thanks to my buddy, Max, who let me borrow it back for scanning after giving it to him (which is kind of a weird thing to do.)