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Originally Posted by formulaterp
Let's say you were observing Jupiter through a telescope. You spot shadows cast on the planet's surface by 3 of the 4 Galilean moons. Even if you cannot identify the moons (or their shadows) individually, you can know the identity of 1 of the moons with complete certainty. Which one is it, and why?
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Io is moving rapidly, or do I have to cogitate for this one?
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Lighten up! This is a stellar board! Author: duh.
"The Sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do..." Author: Galileo supposedly.
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