Astronomy 50: The Solar System Readings for Sky Motions

Text Ch. 2.1 - 2.2; p. 95-105


These pages also help with visualization:
Guide to Celestial Sphere
Apparent Star Motions from different latitudes
Apparent Motion of the Sun
Planetary Motions
Animations of Retrograde Motion and Models


Sky Charts
Schenectady at Heavens-Above.com
Sky View Cafe

More on history of development of Heliocentric Universe:
Geocentric Universe
Heliocentric Universe


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Last updated: March 30, 2013