Without complicated formulas, Perelman masterfully talks about cosmonautics and astronomy with clear and illustrative examples.Why is the rocket flying? How could people live on the moon? What is weightlessness? How do the planets move? In his books, readers will find understandable explanations for the laws of physics and the cosmos.In the age of gadgets and short videos, it's interesting to go back 100 years and find out how people imagined space flights back then and how accurate their predictions turned out to be.