The phases of the Moon are the different shapes of the Moon as seen from Earth, caused by its orbit around our planet. There are 8 main phases, each lasting for a specific number of days in the 29.5-day lunar cycle.Phases of the Moon & Their Transformation Days:1. New Moon – Day 0The Moon is between Earth and the Sun, making it invisible.2. Waxing Crescent – Days 1-6A small, right-side crescent starts appearing.3. First Quarter – Day 7Half of the Moon is visible (right side is lit).4. Waxing Gibbous – Days 8-13More than half of the Moon is lit as it moves toward a full moon.5. Full Moon – Day 14The entire Moon is illuminated.6. Waning Gibbous – Days 15-20The Moon starts decreasing in brightness (left side is lit).7. Last Quarter (Third Quarter) – Day 21Half of the Moon is visible (left side is lit).8. Waning Crescent – Days 22-28A small crescent remains before returning to a new moon.The cycle then repeats every ~29.5 days.