 Apart from meteors within the atmosphere and low @-@ orbiting satellites , the main apparent motion of celestial bodies in Earth 's sky is to the west at a rate of 15 ° / h = 15 ' / min . For bodies near the celestial equator , this is equivalent to an apparent diameter of the Sun or the Moon every two minutes ; from Earth 's surface , the apparent sizes of the Sun and the Moon are approximately the same . 
