As in Philosophy, so it is in Astronomy, there are many events that happen on a regular basis that we take these proceedings for granted. In Philosophy the question, “How do you know that the sun will rise again tomorrow?” always comes across the first year philosophy student and leaves him just as perplexed about it at the end of his ponderings as he did prior to them. The fact of the matter is, the sun does not move in the manner in which we commonly take for granted.

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