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At what angle do you hold out your arm at 10 and 15 degrees? [duplicate]

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Closed as duplicate by Charlie Brumbaugh‭ on Nov 8, 2021 at 15:35

This question has been addressed elsewhere. See: Approximating the time remaining before sun is set and it starts getting dark

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Can you pls elaborate on the 10 degrees and 15 degrees? I don't know geometry or math. How exactly do you hold out your arm against the sun? At what angle to the sun? Illustrations appreciated please!

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Spot on. Getting a routine is absolutely critical. You can sense the passing of time by watching the movement of the sun. So if you put your arm out -- and this is the same for all of us, 'cause our hands and our arms are about the right proportion -- that's 10 degrees, which is just under an hour. 15 degrees is how much the sun moves in an hour. So you know that you've got as many of those as it is for the time of year before sunrise and sunset. So there are things you can do to keep track of time.

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The missing context in this quote is apparently that you then use a part of your hand after the arm is extended to guage 10° in the sky. Look where you got that quote from, and it probably mentions the palm, 4 fingers together, or the like.

The point is, this gives you a rough guide how far the sun will appear to move in the sky in an hour. As the quote mentions, ideally you want to measure out 15°.

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