Earth's atmosphere blocks much of the light that astronomers need to observe distant stars. to get around this problem, nasa put a powerful telescope a) on mars. b) on the moon. c) in orbit around earth. d) in orbit around the moon.

The answer is;  C

By putting the Hubble telescope in orbit around the earth, they avoid most of the earth’s dense  atmosphere. The atmosphere causes a phenomenon referred to as atmospheric differential diffraction of light that is the reason we see stars as twinkling (yet they really don't twinkle). Avoiding atmosphere, therefore, improves image quality, reduces mirages, and reduces errors in observation.  

answer: 45

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