Kepler publishes Astronomia Nova 1609 AD

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Kepler publishes Astronomia Nova

Kepler publishes Astronomia Nova
1609 AD published

Details what are now known as the first two of Kepler's laws of planetary motion.

  1. the planets move in elliptical orbits with the Sun at one focus
  2. the speed of the planet varies inversely based upon its distance from the Sun

The result of 10 years of study of Mars orbit data largely collected by his former employer Tycho Brahe.

Prague
Lattitude: 50.0755° N
Longitude: 14.4378° E
Region: Russia and Eastern Bloc
Russia and Eastern Bloc
Modern Day Czech Republic
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The three models of planetary motion prior to Kepler — Page 132 of Johannes Kepler's Astronomia Nova
Photo Credit: By Johannes Kepler - http://www.library.usyd.edu.au/libraries/rare/modernity/kepler4.html, Public Domain, https://commons.wikimedia.org/w/index.php?curid=306735
The three models of planetary motion prior to Kepler Page 132 of Johannes Kepler's Astronomia Nova
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Mars apparent retrograde motion — Diagram of the geocentric trajectory of Mars through several periods of apparent retrograde motion (Astronomia nova, Chapter 1, 1609)
Photo Credit: Public Domain, https://commons.wikimedia.org/w/index.php?curid=1164908
Mars apparent retrograde motion Diagram of the geocentric trajectory of Mars through several periods of apparent retrograde motion (Astronomia nova, Chapter 1, 1609)
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