Three theorems describing orbital motion. The first law states that planets move in elliptical orbits with the sun at one focus. The second states that the radius vector of a planet sweeps out equal areas in equal times. The third law relates the distances of the planets from the sun to their orbital periods.
- ‘He therefore accepted Kepler's theory of elliptical orbits for the planets and tested Kepler's laws by direct observation.’
- ‘The second of Kepler's laws suffered an even worse fate in being essentially ignored by scientists for around 80 years.’
- ‘Dembski's anti-extrapolationism seems a lot like saying that, while Kepler's laws might hold on any given day, they don't hold over whole years.’
- ‘In his view, just as Newton had explained Kepler's laws with his new mechanics, so he, Dalton, had explained the laws of proportion with his atomism.’
- ‘I had just finished my essay about Kepler's laws when the phone rang.’