That means the terminator—the line between day and night—moves across the moon's surface by one 28th of its diameter each (earth) night. Thus, is takes fourteen days to go from news to full, and another fourteen to go from full to new. read more
A full Moon occurs every 29.5 days, and actually occupies just an instant of time — the exact moment when the Moon and the sun are on opposite sides of the Earth (or at least, as opposite as they’re going to get). read more