Further discoveries by Johannes Kepler (1571-1630) confirmed the second of these hypotheses, and added two other discoveries: 1) planetary orbits in the shape of ellipses, and 2) an explanation of ...

Copernicus' concept of a heliocentric universe was further developed by the great German mathematician Johannes Kepler - the first true astrophysicist. It is to Kepler that we owe the discovery ...

Many of the greatest scientific discoveries were the result of collaboration. Johannes Kepler’s laws of planetary motion were based on data collected by Danish astronomer Tycho Brahe.