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Is that a satellite or a star twinkling in the night sky? Examine the differences between natural and man-made objects in space and learn about the tools used for space exploration. Video clips on the solar system, the moon and the vast array of stars will help your students appreciate the relative size of the planets, the distance from the sun, and much more. They can even reference library articles covering the role of the sun and moons; the importance of telescopes, the lessons of the Voyager expedition; and the benefits of scientific inquiry.