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The moon orbits the earth in a little under 28 earth days. It travels at almost 2,290 miles per hour. Coincidentally, the moon's rotation period is also a little under 28 days, meaning the same face points toward the earth during its entire orbit.
Answer: This explanation can be a bit confusing, so have patience. The moon takes 27 1/3 days to orbit the earth once, but the number of days between one full moon and the next full moon is 29 1/2 days.