How do moon phases occur and their different lengths ?

These differing shapes of illumination are referred to as the ‘phases’ of the Moon, which occur in a perpetual cycle over a 29.5-day (synodic) period. There are eight main identifiable phases which follow each other sequentially as the Moon orbits the Earth according to the changing relative positions of the Earth, Moon and Sun.

Explanation:

so yeah

[content deleted] - user123802726recklesschicken