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Glenn Chaple's observing basics: Watching the sky move

February 2007: You can observe the effects of Earth's rotation on sky motion.
It's true, I have no life. I'll stare at a clock for minutes on end, to see if I can pick up the minute-hand motion. I can detect this subtle movement by using the little minute markers as reference points. Try it, if you have plenty of time on your hands. Translation: You have no life.

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