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The Cerro Paranal telescope array in southern Chile uses four 8.2-m diameter reflecting telescopes. The site is in the Andes Mountains at 2,600 m above sea level. It is approximately 120 km from the nearest town of any significant size. Why is this a good site for a light telescope? Why isn’t it?

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The Cerro Paranal telescope array in southern Chile uses four 8.2-m diameter reflecting telescopes. The site is in the Andes Mountains at 2,600 m above sea level. It is approximately 120 km from the nearest town of any significant size. Why is this a good site for a light telescope? Why isn’t it?






 
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