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Objects visible from space
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Objects visible from space to astronauts in earth orbit without mechanical aids such as a camera or binoculars include highways, dams, and cities. Despite popular belief, the Great Wall of China lacks sufficient contrast to be seen. * Cities are easily distinguishable from surrounding countryside by both shuttle astronauts in an Earth orbit 135 miles (217 kilometers) high. They are just as visible on the space station which is in a higher orbit, circling the planet at 250 miles (400 kilometers). Using binoculars, the astronauts can see roads, airports, dams and even large vehicles. Harbors and even large ships and tankers can be seen on the oceans. |
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