http://www.challenger.org/programs/iss/iss.cfm
Mapping out the orbit of the space station presents a lot of problems. Since the earth is rotating and the space station is moving, the location compared to a fixed point on earth is constantly changing. The you might think that the space station goes around in a circle but if you look at the map above to shows that to orbit is not round and changes every time it orbits the Earth. NASA had to make special map projections in order to accurately display the orbit.
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