How to set the moon dial (the moon's age)|
on your clock
A moon disk
(and some small print)
|A moon disk has 59 teeth and is indexed twice in 24 hours. It makes half a revolution in 29-1/2 days. The moon actually circles the earth in a sidereal month averaging 27 days, 7 hours, 43.2 minutes. However, because the Earth is constantly moving along its orbit about the Sun, the Moon must travel slightly more than 360° to get from one new moon to the next. Thus, the lunar month is longer than the sidereal month, lasting 29 days, 12 hours, and 44.05 minutes, not exactly the 29-1/2 days measured by your moon dial - but close !!|
Here's this month's moon phase calendar
- is your moondial set properly?