* The moon doesn't produce its own light: It reflects sunlight.
* The moon orbits the Earth: This orbit takes about a month to complete.
* The angle at which sunlight hits the moon changes as it orbits: This changes the amount of illuminated surface we see from Earth.
Here's a simplified explanation:
1. New Moon: The moon is between the sun and Earth, so we see the unlit side.
2. Waxing Crescent: The moon is moving away from the sun, and we start to see a sliver of the illuminated side.
3. First Quarter: Half of the moon's surface is illuminated, and it looks like a half-circle.
4. Waxing Gibbous: More than half of the moon's surface is illuminated, and it's getting rounder.
5. Full Moon: The sun and moon are on opposite sides of the Earth, and we see the entire illuminated side.
6. Waning Gibbous: The illuminated side of the moon starts to shrink.
7. Last Quarter: We see the other half of the moon illuminated.
8. Waning Crescent: The illuminated side continues to shrink until it's back to a sliver.
This cycle repeats every month!
