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(3 classifications) (12 resources)


Classifications (LC)
Calculation of orbits (17)
Perturbations (30)
Theory of tides (2)

 

Resources

This web page, authored and curated by David P. Stern, describes the precession of the Earth's axis of rotation relative to the stars. It describes the discovery by the Greek astronomer Hipparchus that the position of...
This web page, authored and curated by David P. Stern, discusses why and how sundials tell time. It provides instructions for teachers and students on how to create a paper sundial, tells how to design sundials for...
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