1. Sunlight: The sun emits light and heat.
2. Reflection: The moon's surface is covered in dust, rocks, and craters. When sunlight hits these surfaces, it gets scattered and reflected back into space.
3. What we see: This reflected sunlight is what we see as moonlight. It's essentially sunlight bouncing off the moon.
Why does the moon have phases?
The moon's phases are caused by the changing angles at which we see the sunlit portion of the moon as it orbits Earth. Imagine the moon as a giant ball with one side always illuminated by the sun. As the moon orbits Earth, we see different amounts of this illuminated side, resulting in the familiar phases:
* New Moon: The moon is between the sun and Earth, so we can't see the sunlit side.
* Waxing Crescent: A small sliver of the sunlit side is visible.
* First Quarter: Half of the sunlit side is visible.
* Waxing Gibbous: More than half of the sunlit side is visible.
* Full Moon: The entire sunlit side is facing Earth.
* Waning Gibbous: More than half of the sunlit side is visible, but getting smaller.
* Last Quarter: Half of the sunlit side is visible.
* Waning Crescent: A small sliver of the sunlit side is visible.
This cycle repeats about every 29.5 days.
