Great wall of china dating
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The Great Wall of China, frequently billed as the only man-made object visible from space, generally isn't, at least to the unaided eye in low Earth orbit. You can, though, see a lot of other results of human activity.
Taken with a 180mm lens and a digital camera last Nov. Chiao himself said he didn't see the wall, and wasn't sure if the picture showed it.Many historians have claimed that the wall could be a remnant of a Parmer fortification, which would prove the existence of a 1,000 year-old kingdom.The fortification, parts of which are yet to be excavated, may be the longest fortification in India, and the second longest in the world after the Great Wall of China.The wall appears as an orange line extending the length of the image. He says that generally the Great Wall is hard to see and hard to photograph, because the material from which it is made is about the same color and texture as the area surrounding it. The theory that the wall could be seen from the Moon dates back to at least 1938.It was repeated and grew until astronauts landed on the lunar surface.The length of the wall, starting from Gorakhpur-Deori and going on till Chokigarh in Chainpur Bardi in the Raisen district, is interrupted by more modern constructions such as a dam.
But along its length, archaeologists have discovered several relics of temples and murals."The only thing you can see from the Moon is a beautiful sphere, mostly white, some blue and patches of yellow, and every once in a while some green vegetation," said Alan Bean, Apollo 12 astronaut."No man-made object is visible at this scale." From space you can see a lot of things people have made, Lulla said.Perhaps most visible from low Earth orbit are cities at night. Of the wall visibility theories, Lulla said: "A lot has been said and written about how visible the wall is.Cities can be seen during the day too, as can major roadways and bridges, airports, dams and reservoirs. In fact, it is very, very difficult to distinguish the Great Wall of China in astronaut photography, because the materials that were used in the wall are similar in color and texture to the materials of the land surrounding the wall -- the dirt." It's questionable whether you can see it with the unaided eye from space.The latest excavation to remind historians of these yet to be discovered fragments of history is that of a mysterious 80-120 km long wall that runs right through the heart of the country with no plausible excuse for existing.