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Product Information How far away are the stars? What are they made of? How do we know ? The answers to these questions are not simple. Unlike a specimen or an unknown compound in a lab, we cannot directly measure stars and other objects in distant space. This set provides a basic introduction to the science of measuring space. Set Includes: Star Field, Parallax and Proper Motion, Variable Stars I, Variable Stars II, Star Color and Temperature, Stellar Spectra, Radial Velocity and Recession of Galaxies.  Tell a Friend about this item
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