Johannes Kepler's New Astronomy

Introduction | Extras
What's New

• Part I: On the Relationships of Hypotheses

• Part I, Chapter 1, observing the heavens
• Part I, How long is a Mars year?
• Part I, Equivalence of Hypotheses (interactive)
• 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, 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: The First Inequality, in Imitation of the Ancients

• 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, Flash Animation for the vicarious hypothesis
• Part II, Chapter 21, May a false hypothesis yield the truth?
  
  

• Part III: The Second Inequality, the Key to an Astronomy of Physical Causes

• 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 37, the diameter of power
• Part III, Chapter 38, vis insita
• 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: The First Inequality, Truly Measured by Kepler's Physical Causes

• Part IV, Chapter 41, three points make a circle?
• Part IV, Chapter 42, determining the eccentricity
• Part IV, Chapter 43, applying area-time to the circle
• Part IV, Chapter 44, the path is not a circle
• Part IV, Chapter 45, proposed non-circular motion
• Part IV, Chapter 46, implementing the oval hypothesis
• Part IV, Chapter 47, applying area-time to the oval
• Part IV, Chapter 48, trying distance-time insted
• Part IV, Chapter 49, back to fundamentals
• Part IV, Chapter 50, six new approaches
• Part IV, Chapter 51, distances determined
• Part IV, Chapter 52, mean sun demolished!
• Part IV, Chapter 54, ratios reconsidered
• 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: On the Latitudes

• Part V, Chapter 61, nodes
• Part V, Chapter 62, inclination
• Part V, Chapter 63, physical causes of latitude
• Part V, Chapter 64, parallax
• Part V, Chapter 68, the Royal Road