Expanding Universe
Discusses objects within the universe (galaxies) and how measurements are made within the universe and evidence (red-shift and Doppler Effect) that the universe is still expanding.
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Heliocentric and Geocentric Models
Differences between heliocentric and geocentric model and evidence used to reinforce each theory.
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Orbits and Ellipses
Orbits (revolution) of planets around the sun, eccentricity of orbits, properties of ellipses and seasonal relationships distance from sun.
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Planets
Characteristics of different planets.
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The Universe, Stars and Their Creation
Reviews creation and characteristics of stars and the universe. Big Bang, Doppler effect, etc.
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