can the gr8 wall of china be seen from space?
February 16, 2007 4:07am CST
i hv heard this many time hv u also ?
16 Feb 07
Generally it is believed that an object has to be about 500 metres x 500 metres to be able to be seen and the great wall is about 10metres wide. Earths atmosphere extends up to about 400km and apparently from there you can see it, but only if you know exactly where to look and what you are looking for. In 2003 the chinese had an expedition into space and they reported they could not see it from space.