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The moon cycle (new moon back to new moon) takes approximately 28 days to complete. Therefore, it takes 7 days to reach the first quarter moon, during which a waxing crescent moon is shown. From there, it takes another 7 days to reach a full moon, with a waxing gibbous moon present between day 7 and 14 of the moon cycle. Then, it takes another 7 days to reach the last quarter moon, during which a waning gibbous is seen, and finally another 7, where a waning crescent is seen, the moon is finally back to its original phase as a new moon.

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14y ago

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