Pre-Lecture Reading 1.6

Astronomy Today, 8^th Edition (Chaisson & McMillan)

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  Chapter 1.4: Earth's Orbital Motion, Day-to-Day Changes

Astronomy Today, 7^th Edition (Chaisson & McMillan)

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  Chapter 1.4: Earth's Orbital Motion, Day-to-Day Changes

Astronomy Today, 6^th Edition (Chaisson & McMillan)

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  Chapter 1.4: Earth's Orbital Motion, Day-to-Day Changes

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