ASTR 103 Study Guide - Midterm Guide: Psy, Northern Hemisphere, Tidal Locking
29 Jul 2018
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103 means that you add three more zeros to the end. The exponent is equal to the number of zeros added. It is the north star, right above the north pole. A measure expressed in degrees, or arc minutes. Goes from the north point of the horizon to the south point of the horizon; noon is when the sun hits the meridian. They are almost the same - we always see the same side of the moon. "the moon keeps the same face pointing towards the earth because its rate of spin is tidally locked so that it is synchronized with its rate of revolution (the time needed to complete one orbit). In other words, the moon rotates exactly once every time it circles the earth. North celestial pole - where the imaginary line between earth"s north and south pole intersects the celestial sphere. Zenith - the point in the celestial sphere directly overhead.
