Planet Tables
PhET: Gravity and Orbits (Kepler's Laws of Motion)
Precession (YouTube video)
Nutation vs Precession (NASA Space Geodesy)
extra Reading: What if Earth were a Super-Earth?
(Terashake, video1)Â
(Terashake, video2, N->S, S->N differences)
(Terashake, Lab-Aids)
Virtual Shake (was Virtual California) background
(Virtual Shake video)
Mt. St. Helens Eruption pt1
Mt. St. Helens Eruption pt2