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Seasons
Why we have seasons
Term | Definition |
---|---|
Rotation | The spinning of an object |
Rotation axis | The line on which an object rotates |
Orbit | The path an object follows as it moves around another orbit |
Revolution | The orbit of one object around another object |
Solstice | When earths rotation axis is tilted directly toward or away from the sun |
Equinox | When earths rotation axis is tilted neither toward nor away from the sun |
Waxing phase | Phases of the moon during which less of the moon near side is lit each night |
Waning phase | Phases of the moon during which less of the moon near side is lit each night |
Umbra | The central darker part of a shadow were light is totally blocked |
Penumbra | The lighter part of a shadow were light is totally blocked |
Solar eclipse | On occurrence curing which the moon’s shadow appears on earths surface |