Man must at all costs overcome the Earth's gravity and have, in reserve, the space at least of the Solar System. Konstantin Tsiolkovsky
Man must at all costs overcome the Earth's gravity and have, in reserve, the space at least of the Solar System.
The Earth is the cradle of humanity, but mankind cannot stay in the cradle forever. Konstantin Tsiolkovsky
The Earth is the cradle of humanity, but mankind cannot stay in the cradle forever.
