- Rotation: The moon takes approximately 27.3 days to spin once on its axis, giving rise to its phases as seen from Earth.
- Orbital Motion: The moon orbits around Earth, taking about 27.3 days to complete one full cycle.
Apparent:
- Librations: These are tiny wobbles or oscillations in the moon's rotation and orbital motion that affect our view of the moon's surface from Earth.
- Moon illusion: This optical illusion makes the moon appear larger when close to the horizon compared to when it is higher in the sky.