Interactive NASA Observatorium on satellite orbits and Kepler's Laws tutorial.

http://observe.arc.nasa.gov/
nasa/education/reference/orbits
/orbits.html

Pictures from Newton's Principia and three user-controllable JAVAscript simulations (one for each of Kepler's Laws) nicely illustrate satellite motion.

Online biography from the MacTutor History of Mathematics archive at the School of Mathematical and Computational Sciences, University of St Andrews, Scotland.

http://www-groups.dcs.stand.ac.uk/
~history/Mathematicians/Kepler.html

Kepler was the last scientific astrologer and first modern astronomer. He worked on geometry, calculus and orbital mechanics. There is an extensive set of materials describing the calculation of orbits available. Additional information on Kepler is found in the Rice Catalog of the Scientific Community in the 16th and 17th Centuries.

Satellite Tracking

This site tells you all about the business of launching shuttles, near earth and geosynchronous satellites.

http://liftoff.msfc.nasa.gov/
academy/rocket_sci/
rocket_sci.html

Check out the the satellite page with the J-Track satellite tracking applet to see what's orbiting now, where it is and when you can next see it in the night sky from your location. There's a handy GMT clock and weather map too.

Articles by Brian Beckman, amateur racer and physicist.

http://www.miata.net/sport/Physics/

Articles describing the physics of automobile racing, including discussions of traction, cornering and centripetal acceleration. Also a brief AAA articles which often have physics content.

Banked Curves

NC School of Science and Mathematics tutorial on banked curves

http://courses.ncssm.edu/physics/
physlets/CURVE/curveintro.htm

See also curve banking for roller coasters

http://www.vast.org/vip/book/
CURVES/HOME.HTM