Around 221 BC, Emperor Qin unified all seven warring states to unify China. To strengthen his new territory and protect against the Huns, he ordered the walls around the country to be connected. Today, the wall is around 5,500 miles long. It's astounding size caused some false legends to come up about it: that it's visible from orbit or from the moon. However, this is not true. It's made up of material that's difficult to spot from space; the crumbling stone and clay easily blends in with its surroundings. The only way it would be visible from orbit was if it met certain weather and lighting conditions.Another factor contributing to the poor visiblity of the wall is the pollution caused by China's factories.
In fact, less prominent structures such as desert roads are easier spotted from space.
False beliefs about the visibility of the wall dates back decades. After Neil Armstrong returned from the moon, he was frequently asked if he could see the wall. His answer? He saw lakes and splashes of white on blue, but didn't glimpse the massive Great Wall.
In fact, less prominent structures such as desert roads are easier spotted from space.
False beliefs about the visibility of the wall dates back decades. After Neil Armstrong returned from the moon, he was frequently asked if he could see the wall. His answer? He saw lakes and splashes of white on blue, but didn't glimpse the massive Great Wall.