ShareEarth and Moon - I See You!
Every 29 1/2 days, the moon goes through a complete cycle. The cycle happens as the moon revolves around Earth. While the moon moves around Earth, we see either more or less of the sunlit part of the moon.
Click on a calendar day below to observe a model of the moon. Watch how the moon changes during a month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 29 | 30 | |||||
Notice that the moon is the same on day 1 and day 30. The cycle has happened once.
Observe the moon in the next day or two and see which number on the calendar above that it looks like!
