Celestron 93991 Astronomy for Beginners Expansion Card (Blue)
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Astronomy for Beginners Expansion card adds to the knowledge base of the SkyScout Personal Planetarium. Topics include: Objects in the Sky, Astronomical Distances, Star Hopping and Astro Trivia. References :Star map | Define Star map at Dictionary.comConstellation – Wikipedia the free encyclopediaGreek astronomy – Wikipedia the free encyclopediaRing Nebula: Definition from Answers.com
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