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International Space Station

Is the space station moving or does it stay in one place?


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July 12, 2011 11:14PM

The space station orbits the Earth once every 91 minutes.

It is traveling at a speed of 27,744 km/h (17,239 miles/hour).

At that speed, its angular velocity counteracts the gravitational pull of the Earth, so it maintains its altitude.

The space station orbits the Earth in a direction opposite to the Earth's rotation. Its orbit is almost circular, but tilted 51.6 degrees, relative to the equator.

On each orbit, it spends half of its time over the northern hemisphere and half over the southern hemisphere.

Over the course of many orbits, the space station will pass over most of the inhabited parts of the Earth.

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