In the center of the Universe, according to Aristotle, there is a stationary Earth, around which eight celestial spheres revolve, solid and transparent. Celestial bodies are fixed on them: planets, the moon, the sun, stars. The ninth sphere provides the movement of all other spheres, it is the engine of the Universe.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.