All cosmic bodies move in orbits. “Orbit” means “traveling in a circle”: the planets move around the star of the Sun, and the satellites of the planets, such as our Moon, around their planets. The moon, planets and other space objects can fall into the gravitational field of a larger space object and rotate around it. The earth passes in an orbit a circle for 365 days, “earthly year”. The largest known orbits belong to the stars of our Milky Way galaxy, the movement along them takes 200 million years.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.