This was a reprint of a 1961 Russian book translated into Estonian in 1963. It is mostly an anthology of stories for children but with space art on the cover and a couple of space illustrations within I needed to share it.
Jarunkova, Klara. Illustrated by Eesti Riiklik Kirjastus. Translated by A. Raid. The Hero's Ride. Tallinn: Estonia. (90 p.) 1963.
I think the translated title is : "To the Moon with A Rocket. " It seems to be about a a boy and his friend and his dog who want to go to the moon (since they are bored after school.)