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Seasons
Why we have seasons?
| Term | Definition |
|---|---|
| Rotation | The spin of an object around its axis |
| Rotation axis | The line on which an object roatates |
| Orbit | The path an object follows as it moves around another object |
| Revolution | The orbit of one object around another object |
| Solstice | When earths rotation axis is tilted directly towards or away from the sun |
| Equinox | When earth’s rotation axis is tilted neither towards nor away from the sun |
| Phase | The lit part of the moon or a planet that can be seen from earth |
| Waxing phase | Phases of the moon during which more of the moon’s near side is lit each night |
| Waning phase | phases of the moon during which less of the moon’s near side is lit each night |
| Umbra | The central, darker part of a shadow were light is totally blocked |