Moon phase display

Moon phase display

The moon phase is actually a lunar calendar, indicating the cycle of the moon's loss. The sun, the moon and the stars are the most intuitive objects, but the moon phase is related to the latitude. Design principle: The moon phase function is often placed in a special-shaped semi-circular window. This particular shape consists of a semi-circular arc and two small arcs. This well-designed shape, combined with the moon on the moon phase plate, tells us more accurately the shape of the moon at the beginning or end of a cycle. How it works: The moon phase is the state of the moon on the moon phase disk based on a period of 29.5 days. There are two moons on this moon phase plate, and there are 59 teeth on the edge. After the moon phase wheel is pushed by the transmission wheel, one tooth is pushed forward every day. At this time, the change of the moon phase profit and loss can be timely displayed on the dial. The 59-tooth moon phase wheel is derived from the average of one cycle every 29.5 days of the moon phase. Since the precise rotation period of the moon is 28 days, 12 hours, 44 minutes and 2.9 seconds, the error of the moon phase is displayed every 33 months. Will reach 24 hours. There is usually a moon phase adjustment button on the case, and the moon phase display is relatively independent of functions such as timing and perpetual calendar.