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orbit.

Recently China’s own astronaut said he couldn’t see the monumental structure. The Chinese

were devastated as the Great Wall is their national treasure. With a 8.2. _______________ of

more than 2,000 years, it is one of the most appealing tourist attractions.

Whether the Wall is visible from space has often been called into question. It is very difficult

or even impossible to distinguish it in astronaut photography because numerous factors must

be 8.3. _______________ into consideration. Firstly, the material from which it is made is

the same colour and texture as the area surrounding it. 8.4. _______________ from the material,

other factors like the shape of the structure, the resolution of the photo camera, and the condition

of the atmosphere also mystify the interpretation of the image.

adapted from www.nasa.gov

8.3.

taken

8.4.

Apart/Aside