Sky Legislator

Kepler followed Copernicus' proposal of a new direction for the heliocentric theory, carefully analyzed and calculated the data of his teacher Tycho's long-term observations of planets, especially Mars, and found that the solar system is just a mathematical game, and planets orbit the sun precisely according to rules. He summarized three major laws to describe the laws of planetary motion. These three laws laid the foundation for the discovery of universal gravitation and, together with the law of universal gravitation, confirmed the correctness of the heliocentric theory.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

Kepler's first law (orbital law): Each planet orbits the Sun along an elliptical path, with the Sun located at a focal point of the ellipse. Kepler's Second Law (Law of Area): The line connecting the planet and the sun sweeps an equal area at equal time intervals. Kepler's third law (periodic law): The square of the orbital period of each planet around the sun is proportional to the cube of the semi major axis of their elliptical orbit.