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Sun, Earth, Moon
| Term | Definition |
|---|---|
| orbit | The path that a space object takes around another object in space |
| revolution | amount of time it takes for a celestial body to go around another |
| rotation | The spinning of a planet, moon, or star on its axis |
| axis | the imaginary line about which a body rotates |
| atmosphere | the envelope of gases that surround planets |
| satellite | an object that orbits a planet |
| moon | a natural object that orbits a planet and does not produce it own light |
| star | an object in space that makes its own heat and light |
| impact crater | bowl shaped impression formed when objects smash into the surface. |