Every month. One month, give or take is when the moon goes through its full cycle. From new moon to [waxing crescent] to first quarter (week one) then to [waxing gibbous] to full moon (week two) then to [waning gibbous] to third quarter (week three) to [waning crescent] and finally by the end of the fourth week, new moon again.
29.5 days
29.53 days
every four years
The moon takes about 29.5 days to go through a complete cycle of phases, known as a synodic month. This cycle includes all the phases from new moon to full moon and back to new moon again.
The pattern of the moon phases repeats approximately every 29.5 days, known as a lunar cycle or synodic month. This is the time it takes for the moon to go through all its phases, from new moon to full moon and back to new moon again.
8 phases.
The changes in shape that the moon goes through are called phases.
29.53 days
It takes one month for the Moon to go through all of its phases one time.
There are 8 phases of Earth's Moon: New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, and Waning Crescent.
The moon has different phases that it passes through, just like we have different phases in our lifetimes.
From the perspective of the earth, the most apparent objects that go through phases are the moon, Venus and Mercury