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Through the years many man made satellites have been placed in space for various purposes. But what keeps them up there without crashing into eachother so debris doesnt fall to the earth? With around 2000 satellites drifting around the planet, something has to stop them from colliding, right? When satellites are launched into orbit, their orbit is recorded, and others are launched with orbits such that no two will collide. However, over very long periods of time orbits can shift slightly, so technically nothing stops them from crashing into eachother. Fortunately even in the event of a crash, falling debris is no danger. As small pieces of satellite from a crash fall towards the earth, they experience a large drag force upon entering the atmosphere, generating heat, and causing the falling objects to burn out long before they get to a dangerous distance


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