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When it is mentioned at all, the force of gravity is often portrayed as a sort of cosmic quicksand, an intractable mire that can yank spacecraft out of the sky without any consideration of inertia. Frequently accompanied by exclamations like, "We're caught in the planet's gravitational field!" or "We're being sucked in!"
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The trope stems from a naive Aristotelian view of gravity, coupled with [[Space Friction]]. After all, a baseball falls to the ground; why shouldn't a spaceship? The answer, of course, is that the ship ''is'' falling, it's simply missing. If the ship is moving at any significant speed relative to the planet, in a direction other than straight up or straight down, its momentum will carry it past and it won't actually hit. This, boys and girls, is called an "orbit". Unless something like a gas cloud acts on the ship to slow it down, it will continue to miss the planet until slight variations in the path happen to bring it into the planet itself, which can take quite a long time.
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