Here's why:
* The Earth is a sphere: This means that there's a curvature to the planet.
* The moon orbits the Earth: While it appears to be in the sky, the moon is a significant distance away.
* Line of sight: Because of the Earth's curvature, the moon will always be visible to people on one side of the Earth, while it will be hidden from view on the opposite side.
So, if you're in Egypt, you can only see the moon when it's on the same side of the Earth as you are. The side of the Earth opposite Egypt would be blocked by the planet itself.
