Astronomy
Click here to find angles of altitude of the sun and moon for US cities.
The Moon
Click here for an informative explanation of moon phases produced by Harcourt School Publishers
Eclipses
Click through this animation of solar eclipses designed by the BBC
MSNBC has an informative animation on solar eclipses
McGraw-Hill has this interactive of solar and lunar eclipses Shadow and Substance has animation of the pathways for the 2010 solar and lunar eclipses NASA's Solar Eclipse page has all the information you'll ever need about solar eclipses