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doit_the_clown doit_the_clown
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7 years ago
The best Earth-based sites for modern large astronomical telescopes, which provide the least seeing effects upon astronomical images, are
A)   near large cities, where the warm air from human activity serves to stabilize the overlying atmosphere.
B)   at sea level, where the air is less turbulent.
C)   on the downwind side of mountain ranges, where smooth airflow produces clear air and stable images.
D)   on the tops of high mountains, above a large fraction of the disturbing atmosphere.
Textbook 
Discovering the Universe

Discovering the Universe


Edition: 7th
Authors:
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Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.

Albert Einstein
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papachulopapachulo
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7 years ago
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7 years ago
this is exactly what I needed
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Brilliant
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2 hours ago
Good timing, thanks!
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