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        K-6

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        Planets | Science Trek

        This video segment from IdahoPTV's Science Trek describes the sun, the center of the solar system, the planets, and asteroid belt of the solar system. It explains why earth is in a favorable spot for life, and the importance of gravity in keeping planets in their orbits. Learn how the planets are alike and different.

        Visit the Science Trek companion Web site to learn more about Planets.

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