what did johannes kepler do as a scientist
Johannes Kepler, (born December 27, 1571, Weil der Stadt, WÃ¼rttemberg [Germany]âdied November 15, 1630, Regensburg), German astronomer who discovered three major laws of planetary motion, conventionally designated as follows: (1) the planets move in elliptical orbits with the Sun at one focus; (2) the time necessary to traverse any arc of a planetary orbit is proportional to the area of the sector between the central body and that arc (the âarea lawâ); and (3) there is an exact ...