Stuck in someone else's frames? break free!
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IS
ROTATING THE SAME AS REVOLVING?
Make one
complete turn in place. When you or any object Now place
another student or a globe of the earth in the You have
probably noticed that you see only one side of the After one
complete orbit, decide whether or not the moon Repeat this
activity, but have the moon (you) face in a Yes. Is the earth
moving, and if it is, what is the evidence for From the discussion, you will appreciate why it was generally believed that the earth was a stationary object at the center of the universe. Most of the your observations of the sky suggest that the sun, moon, planets, and stars move around the earth. We all know some people who think they are the centers of the universe. Well, it is only reasonable to believe that if I were the center of the universe, all that stuff would move around me. I hope it doesn't get sun-spots on my ego...
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