HEROES OF SPACE
JOHANNES KEPLER
The astronomer who redefined our understanding of the Solar System
© Getty; Public Domain
Kepler was born on 27 December 1571 in the small town of Weil der Stadt in what is now the German state of Baden-Württemberg. He became a proponent of the Copernican system of planetary motion in the early 1590s, and in 1596 he published Mysterium Cosmographicum (The Cosmographic Mystery), a detailed public defence of the theory, but it was a position that was still frowned upon. Kepler’s laws of planetary motion wouldn’t be formalised until after he began working with Danish astronomer Tycho Brahe in 1600.