As the moon orbits Earth, it cycles through eight distinct phases. The four primary phases of the moon (new moon, first quarter, full moon, last quarter) occur about a week apart, with the full ...

On average, it takes around 29 and a half days for the Moon to complete one cycle, with around seven and a half days between its four main phases: new moon, first-quarter moon, full moon and last ...

This means we see the Moon’s phases from Earth as different shapes ... other moons existed until 1610 when Galileo discovered the four largest moons orbiting Jupiter: Io, Europa, Ganymede ...