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vocb
| Term | Definition |
|---|---|
| luminous | an object that gives off light |
| inertia | the tendency of an object to resist a change in motion or rest |
| revolution | one full orbit around an object |
| rotation | one spin of a planet or it's axis |
| counterclockwise | a direction opposite to the rotating hands of a clock |
| axis | an invisible line going North South through the earth |
| Seasons | caused by the way the sunlight hits the earth according to its axes |
| solar eclipse | occurs when the moon moves between the sun and earth so that the sun is not visible. |