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Kepler’s Third Law

Credit: National Air and Space Museum, Smithsonian Institution

Kepler’s Third Law compares the motion of objects in orbits of different sizes. A planet farther from the Sun not only has a longer path than a closer planet, but it also travels slower, since the Sun’s gravitational pull on it is weaker. Therefore, the larger a planet’s orbit, the longer the planet takes to complete it.

 

Categories: Flight Dynamics
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