Here's why:
* Earth's Rotation: The Earth spins on its axis, so different parts of the Earth face the Moon at different times.
* Lunar Phases: The phases of the moon are caused by the changing angles of the sun's light reflecting off the moon as it orbits the Earth.
* Perspective: Because of these factors, the Moon's phase appears different depending on your location on Earth.
Example: If you're in the Eastern Hemisphere and see a full moon, someone in the Western Hemisphere might be seeing a waning gibbous moon, as the Earth has rotated.
