The Karmann line is named after the physicist Theodor von Karmann. This boundary is widely considered to be the boundary between Earth and space. Typically, that line is defined as 100 kilometers above the Earth’s surface.
So, what can be seen from such a distance? For example, on a clear day, would one see the Great Wall of China or the Great Pyramid of Giza on the way to Kerman?
The Bingham Canyon Mine, located about 32 km southeast of Salt Lake City, is the largest man-made excavation ever. The mine is so large that it is visible not only without magnification from the Carman Line, but also to astronauts aboard the US Space Agency’s (NASA) space shuttle, an altitude of 190 more miles (305–531 km). On circumambulating. ) sea above the surface.
According to NASA, the Three Gorges Dam extending to the Yangtze River in China is also visible from space. The dam is easily the largest electricity generating facility in the world and is considered the most expensive hydroelectric dam ever built, France 24 report good. It is 607 feet (185 m) long and over 1.2 miles (2 km) long.
Some highways, especially those that pass through barren areas such as the desert, can also be selected depending on conditions and lighting, according to Chris Hadfield, a former ISS commander.