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 ...

The man at the center of this story is none other than Johannes Kepler (1571–1630), the scientist ... His exhaustive efforts led him to two key discoveries: the speed of a planet varies ...

The shape of a planet's orbit is one of its fundamental properties, along with its size and distance from its host star.

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.