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Chapter 1: Science and the Universe
Chapter 2: Observing the Sky
Chapter 3: Orbits & Gravity
Chapter 4: Earth, Moon, & Sky
Chapter 5: Radiation & Spectra
Chapter 6: Astronomical Instraments
Chapter 7: Other Worlds
Chapter 8: Earth
Chapter 9: Cratered Worlds
Chapter 10: Venus & Mars
Chapter 11: Giant Planets
Chapter 12: Rings, Moons, & Pluto
Chapter 13: Coments & Asteroids
Chapter 14: Solar System Origins
Chapter 15: The Sun - Classification
Chapter 16: The Sun - Energy
Chapter 17: Starlight
Chapter 18: The Stars
Chapter 19: Distances
Chapter 20: Gas & Dust
Chapter 21: Exoplanets
Chapter 22: Lifecycle of Stars
Chapter 23: Death of Stars
Chapter 24: Black Holes
Chapter 25: The Milky Way
Chapter 26: Galaxies
Chapter 27: Active Galaxies
Chapter 28: Galactic Evolution
Chapter 29: The Big Bang
Chapter 30: Life in the Univers
Index
File List
Link
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Chapter 26 Gifs
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