Free Download Ben P Stein, "Planetary Motion (Science Foundations)"
English | 2009 | pages: 118 | ISBN: 1604130172 | PDF | 4,1 mb
Thousands of years ago, people fascinated by the motions of a few wandering 'stars'. Today, people know these objects are planets, but the quest to reach this understanding took thousands of years. This title helps to learn how scientists have found new planets outside the solar system, and continue their search for planets like Earth.
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