Applets to play with.

Epicycles:

http://astro.unl.edu/naap/ssm/animations/ptolemaic.swf

http://physics.syr.edu/courses/java/demos/kennett/Epicycle/Epicycle.html

http://www.jgiesen.de/geocentric/index.html


Copernican vs. Tychonic worldviews:

http://www.stumbleupon.com/su/2jRGYC/dd.dynamicdiagrams.com/wp-content/uploads/2011/01/orrery_2006.swf/

Cool:

http://www.solarsystemscope.com/

http://arachnoid.com/gravitation/index.html


Kepler's Laws:

http://www.physics.sjsu.edu/tomley/Kepler12.html

http://www.phy.ntnu.edu.tw/ntnujava/index.php?topic=9.msg55#msg55

http://www.sunsite.ubc.ca/LivingMathematics/V001N01/UBCExamples/Kepler/kepler.html

http://astro.unl.edu/classaction/animations/renaissance/kepler.html

http://physics.syr.edu/courses/java/mc_html/kepler_frame.html

http://www.physics.sjsu.edu/tomley/Kepler12.html

http://www.walter-fendt.de/ph14e/keplerlaw1.htm

http://www.walter-fendt.de/ph14e/keplerlaw1.htm




Newton and Universal Gravitation:

http://galileoandeinstein.physics.virginia.edu/more_stuff/flashlets/kepler6.htm