Rumours about astronauts being able to see the Great Wall from the moon are scientifically not proven. The Great Wall has shown up in radar images taken from space, but scientists are sure it is not possible for astronauts to see the wall with a naked eye. One astronaut who spoke about the visibility of the Great Wall from space was Neil Armstrong. He said that on the moon, it was very clear that the wall was not visible. However, astronaut William Pogue was able to see the wall from a Low Earth Orbit distance (300–530 km height), but only with binoculars and with lots of practice.