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The top documents tagged [constellations groups]
Chapter 2 Stars and Galaxies. Where are you? The Earth circles the sun The sun is one of billions of billions of stars. To measure distances between stars
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CHAPTER 1 – Discovering the Night Sky Constellations Celestial Sphere Movements of the Earth Moon Phases Eclipses
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Chapter 2 Solar System
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Retrograde Motion You’re going the wrong way!. History of Retrograde Motion Ancient Greeks noticed that certain celestial objects changed their locations
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Getting Ready to Read
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