Exploring the Universe by Galileo Galilei

Sunspots did not remain stationary, they moved along its surface, but always in one direction. The conclusion was that the sun rotates around its own axis. Most of all, the discovery of the satellites of Jupiter by Galileo struck his contemporaries. This proved that celestial bodies can revolve not only around the Earth.

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.