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About 7
About 7 days.
The time period between Full Moon and Third Quarter is usually 7 or 8 days, depending on the actual Full Moon and Third Quarter times.
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7 days (that took just one minute to answer)
Yes. The lunar cycle takes 29.5 days, so from the "first quarter" moon (in which one half of the lunar surface is illuminated) to the full moon is 7 days and a few hours.
After the moon is full, an observer on Earth will start to see less of the moon's sunlight hemisphere, we refer to this as "waning". By the time a week passes after a given full moon, the moon's phase will be close to Third Quarter and half of the moon will be illuminated.
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.
A lunar day is 27 days, 7 hours and 43.2 minutes long. This is the time it takes the moon to complete one full rotation with respect to the sun.
Waning gibbous lasts from Full Moon to Third Quarter, so it lasts about 7 days.
Yes, there was a full moon that night.
The complete cycle of all moon phases is 29.53 days (rounded) on the average, with small variations depending on the exact interplay between the non-circular orbits of the earth and moon, which causes relatively small changes in their speeds along their respective paths. But those variations aren't really large enough for the casual observer to notice. For our practical purposes, it's accurate enough to say simply that the time period from any phase until the same thing shows up again is 29.53 days. (rounded)