Falling around Earth
An orbit is not a place where gravity disappears. It is continuous free-fall with enough sideways velocity to keep missing Earth.
Gravity constantly bends a spacecraft’s path toward Earth. If its sideways speed is high enough, the planet curves away beneath it at the same rate. The result is a closed path rather than an impact.
Altitude and speed are linked. In a circular low-Earth orbit, a spacecraft typically travels near 7.8 km/s. Move to a higher circular orbit and the required orbital speed falls—even though the total energy increases.
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