The sun is the center of the universe, and the earth revolves around the sun like other planets. With his bold insight, the 16th century astronomer Copernicus put forward a new theory of the solar system that led the era, thus bringing about a technological revolution. However, it was not until half a century later that the German mathematician Kepler used the observation data provided by the Danish astronomer Budi Gu Brahe to draw the first accurate map of the solar system. Kepler's hard work consolidated Copernicus's theory. He fought alone and finally used Tycho Brahe's observation data to accurately explain the motion of the planet. In his lifetime, his achievements were not recognized, but his insight is still the basis of modern cosmological theory.
