In Quest of the Universe, 5e: Explorations

Title Text: In Quest of the Universe, Fourth Edition

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Explorations

Chapter 2: From an Earth-Centered Universe to a Sun-Centered System

Parallax
This simple (java) simulation shows what parallax is, how it varies with distance, and how the measurement is performed.
Visit the Web Simulation - Parallax web site

Copernicus and the Heliocentric System
A short biography of Copernicus with several links on related aspects of his life and work.
Visit the Copernicus web site

Motions of the Planets - Retrograde
The site contains a good animation of Copernicus's explanation for retrograde motion of a planet.
Visit the Retrograde Motion Animation web site

Retrograde Motion
A description of retrograde motion with animations, both from the Ptolemaic and Copernican points of view.
Visit the Retrograde Motion web site

Kepler's Laws of Planetary Motion
Simulations and descriptions of Kepler's laws can be found in this NASA site.
Visit the Kepler's Laws with Simulations web site