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aileenalmeda
We’ve all seen the traditional grade-school scale models of the solar system. Maybe you made one years ago in science class out of painted Styrofoam balls or colored construction paper.
Or maybe you've seen one of those giant models hanging from the ceiling of a science museum. Big colorful globes, some with rings around them, some painted swirly colors, others looking more like pitted rocks.

link:http://news.discovery.com/space/what-is-space-111013.html
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