| A | B |
|---|
| Sun | The star at the center of our solar system |
| rotate | To spin on an axis |
| axis | An imaginary line that passes through Earth's center and its North and South Poles |
| Revolve | To travel in a closed path |
| Orbit | The path one body takes in space as it revolves around another |
| Equator | An imaginary line around the Earth equally distant from the North and South Poles |
| Moon | Any natural body that revolves around a planet |
| Crater | A low, bowl-shaped area on the surface of a planet or moon |
| Moon Phase | One of the shapes the moon seems to have as it orbits Earth |
| Eclipse | An event that occurs when one object in space passes through the shadow of another object in space |
| Refraction | The bending of light as it moves from one material to another |
