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Understanding that it isn't the sun that's moving, and that its motion

across the sky is an illusion caused by the Earth's rotation . . .

Sun's apparent diameter . . . roughly 1/2 degree of arc

Rotation rate of everything in the sky . . . roughly 360 degrees/24 hours

360 degrees/24 hours = 0.5 degree/T

360 T = 12

T = 12/360 hour = 1/30 hour = 2 minutes .

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13y ago

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