a German astronomer who discovered four of Jupiter's moons. He eventually concurred with Tyco that the other planets orbit the sun while the sun itself orbits the Earth (Tychonic system).
the independent synchronous discoveries of Galileo, Simon Marius, Piazzi, Le Verrier, Herschel, Galle: the systematisations attempted by Bode and Kepler of cubes of distances and squares of times of revolution