Kepler argued that the motion of planets was not dictated by mystical geometric shapes, but by physical forces radiating from the Sun. He suggested that the Sun acts as a physical engine, propelling the planets. This laid the foundation for Isaac Newton's future work on universal gravitation. Accessing an Astronomia Nova PDF
Because the book was published in 1609, it is in the . You can legally download the full Latin original or English translations from several reputable academic archives. Here are the best sources: astronomia nova pdf
The original 1609 Latin edition can be found through digital repositories such as Archive.org or the NASA ADS. Kepler argued that the motion of planets was