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Universe
Universe with examples
Earth
Earth/Moon/Sun Motion Apparent Motion of Planets
Earth/Moon/Sun Motion
Apparent Motion of Planets
Electromagnetic Waves
Telescopes
Stars
Stellar Evolution Measuring Distance, Temperature, Size, Mass & Composition of Stars
Stellar Evolution
Measuring Distance, Temperature, Size, Mass & Composition of Stars
Measuring Distances to Galaxies
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All text, graphics and photgraphs copyright ©2003 by C. Hartley, the Department of Physics at Hartwick College, Oneonta, NY, USA, unless otherwise noted. More things from C. Hartley at his home.