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Portrait of Johannes Kepler

Kepler: the first cosmologist

Johannes Kepler 1571-1630

Another view

Article by Dr Fred Starr PhD, FIMMM, FIE, MIMechE, CEng

Johannes Kepler was, arguably, the first and most important scientific son of Germany, long before it came to be a nation. Kepler was a true genius, who had to move from one country to another to earn a living and to avoid religious persecution, and he can also be claimed for Europe itself.

Kepler’s insight into how the planets move round the sun showed the need for a new physics of the Universe. That is, one that proposed a rational and testable scientific theory. Before Kepler, the belief that the sun, moon, planets and stars revolved round the Earth once a day, being kept in position with invisible rotating crystalline spheres, required no further discussion. Copernicus was stuck with circular motions for how the planets moved, as was Galileo. Read more