Fascinating encyclopedia for future astronomers and astronauts, as well as for all curious guys. Is it easy and fun to talk about the complex science of astronomy? How to penetrate the secrets of the birth and life of distant stars and planets? Why are people so interested in the Sun, Moon, planets, stars and mysterious black holes? In this book, Efrem Pavlovich Levitan, a well-known Russian teacher and author of many books on astronomy for children, answers the most popular and most difficult questions. Together with the main characters, Alka and Sveta, the children fall into a fairy tale composed by the Pope. They are helped to reveal the secrets of the universe by the ubiquitous gnomes Knopkin and Nedouchkin.