Rockets. orbital stations. Space elevator. Hovercraft trains. All these amazing ideas originated in the head of a simple school teacher - K.E. Tsiolkovsky. He believed that one day mankind would be able to overcome the forces of gravity and rise to the stars. And so it happened.The creative heritage of the "Kaluga sage" is truly incredible. On the one hand, these are scientific works with precise calculations that made it possible to turn the dream of conquering the universe into reality. And on the other - a real "cosmic philosophy", reflections on the nature and purpose of man, the structure of society and ethics.