One of the most popular
spatial myths is that the Great Wall is the only man that can be seen from
space. Well, not true. The reality is you cannot easily see the Great Wall from
low Earth orbit to the naked eye. And rightly the Apollo astronauts could not
see it from the moon, despite the urban legend has spread widely.
Neither the first
Chinese astronaut Yang Liwei in 2003, and the Canadian Chris Hadfield in
2012-2013, could see it, the Great Wall of China is too narrow and blends in
with the landscape.
The image above is the
first picture of the Great Wall verifiable from space, which was obtained by
U.S. astronaut Leroy Chiao from a window of the International Space Station in
2004. Photographed a region of Inner Mongolia, but to do Chiao needed to use
the zoom on a digital camera and still was not sure I photographed.
So what structures are
visible from orbit? Astronauts on the International Space Station have said
that (without taking into account the cities at night) the ancient pyramids of
Giza are relatively easy to see from the station, but the easiest to see are
long roads or bridges.
At first glance, you
can see and recognize some artificial structures from space, but the Great Wall
of China is not one of them.
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