# Animating Johannes Kepler's New Astronomy

What's new! [Jan 5,2007]

Feedback is much appreciated!

- Part I, Chapter 1, observing the heavens
- Part I, How long is a Mars year?
- Part I, Ptolemy, Copernicus, Brahe equivalence
- Part I, Ptolemy, Copernicus, Brahe equivalence (exaggerated eccentricities)
- Part I, Chapter 3, the equivalence of an epicycle and an eccentric
- Part I, Chapter 4, Copernicus and Ptolemy: double-epicycle vs equant
- Part I, the Lunatic theory
- Part I, Chapter 3
- Part I, Preztel-shaped perceived motion of Mars
- Part I, Ptolemy and Copernicus -- method and results
- Part I, the Universe according to Ptolemy
- Part I, Chapter 5, mean vs apparent opposition -- first inequality
- Part I, Chapter 6, true heliocentrism
- Part I, everything you wanted to know about mean sun and apparent sun
- Part II, standing on the sun (chapters 8 and 15)
- Part II, Chapter 9
- Part II, Chapter 11
- Part II, Nodes and Inclination, chapters 12 and 13, and second technique.
- Part II, chapter 15, Mean Longitude
- Part II, on the Vicarious Hypothesis, chapters 16-21
- Part II, Chapter 21, May a false hypothesis yield the truth?
- Part III, Chapter 22, the equant is not the earth's center
- Part III, Chapter 23, bisecting the eccentricity
- Part III, watching the earth from Mars, without leaving the earth! (chapter 24)
- Part III, Chapter 30, oval motion
- Part III, Chapter 39 -- the difficulty of approaching geometry from physics.
- Part III, Chapter 40, measuring area
- Part III, the different anomalies (hi-res)
- Part III, Area-Time
- Part III, Wrap-Up
- Part IV, Chapter 43, applying area-time to the circle
- Part IV, Chapter 45, non-circular motion
- Part IV, Chapter 51, distances determined
- Part IV, Chapter 52, mean sun demolished!
- Part IV, Chapter 55, the middle course
- Part IV, Chapter 56, making the correct lengths
- Part IV, Chapter 57, magnetism
- Part IV, Chapter 58, correcting the puff-cheeked orbit
- Part IV, Chapter 59, measuring elliptical distance with circular area
- Part IV, Chapter 60, the Kepler Problem
- Part V, Chapter 68, the Royal Road
- 3DLive Planetary Motion (hi-res)
- Computer help if you're having trouble getting some animations to display.
- Guide to Kepler's use of trigonometry from the New Astronomy
- Quotations from the New Astronomy
- More (includes "The First Astronomy" and .nb notebooks)
  .zip of the site (updated Dec 7th)

### Thanks!

- Thanks to William H. Donahue for translating the New Astronomy and to Cambridge University Press for printing it. And a future thanks to Green Lion Press if they go ahead with the printing of the second edition. Unless otherwise noted, quotations from the New Astronomy are from this edition. Quotations from Ptolemy and Copernicus are from the Great Books series edition.