The moon goes through 8 phases in its cycle, but the length of the cycle itself is about 29.5 days.

Here are the 8 phases of the moon:

1. New Moon: Invisible to the naked eye.

2. Waxing Crescent: Thin sliver of the moon visible, growing larger.

3. First Quarter: Half of the moon is illuminated.

4. Waxing Gibbous: More than half of the moon is illuminated, getting fuller.

5. Full Moon: Entire face of the moon is illuminated.

6. Waning Gibbous: More than half of the moon is illuminated, getting smaller.

7. Last Quarter: Half of the moon is illuminated.

8. Waning Crescent: Thin sliver of the moon visible, getting smaller.

Let me know if you have any other questions about the moon!