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Planet Motions
Basic Terms
Term | Definition |
---|---|
Rotation | Earth rotating on it's axis |
Revolution | Earth orbiting around the sun. |
Seasons | Caused by Earth's Tilt |
Night and Day | Caused by Rotation |
Year | Caused by Revolution |
Kepler's First Law of Motion | Planets orbit the Sun in an ellipse |
Ellipse | Oval |
Kepler's Second Law of Motion | An object speeds up as it is closer to the sun, slow down when it is farther out |
Kepler's Third Law of Motion | The further an object is out in orbit, the longer it takes to orbit the sun. |