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planets move in elliptical orbits with the Sun as a focus Keplers first law of planetary motion
a planet's orbital period is proportional to the size of its orbit (its semi-major axis). Keplers third law of planetary motion
a planet covers the same area of space in the same amount of time no matter where it is in its orbit Keplers second law of planetary motion
Created by: regannerobinson
 

 



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