The Moon doesn't have a set number of "phases" in the way we might think. We usually talk about 8 phases of the Moon, but it's actually a continuous process of changing illumination as the Moon orbits the Earth.

Here's why:

* The Moon itself doesn't produce light. We see it because sunlight reflects off its surface.

* The Moon's position changes constantly. As it orbits Earth, the angle at which sunlight hits the Moon changes, causing the illuminated portion we see to change.

* Phases are just how we categorize the Moon's appearance. We divide the lunar cycle into eight phases for convenience: New Moon, Waxing Crescent, First Quarter, Waxing Gibbous, Full Moon, Waning Gibbous, Last Quarter, Waning Crescent.

So, the Moon doesn't have a fixed number of phases, but rather a continuous cycle of illumination that we divide into eight phases for easier understanding.