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Any orbit of the Earth must have its center at the Earth's center.

So there are two choices for any Earth satellite:

-- Orbit above the equator, never crossing any land that isn't on the equator,

and never visible to people who aren't located close to the equator, or else

-- revolve in an orbit that's inclined to the equator, sooner or later crossing

every point on Earth that lies within the N/S latitudes equal to its inclination,

and eventually visible to the majority of Earth's population.

A satellite can't, for example, orbit entirely above the Tropic of Cancer, or the Arctic Circle.

It must either cross the equator twice in each orbit, or else stay permanently above

the equator.

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11y ago

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