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Because that's the way gravity works.

If you take Newton's formula for the gravitational force, and if you know enough

geometry and calculus to be able to massage and manipulate and excercise it,

you discover that if the central body's mass is huge enough (like the sun), then

the time it takes smaller things to revolve around it depends only on the distance

of the orbit, nothing else. The farther an orbiting object is from the central body,

the longer an orbit takes.

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14y ago

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