As close as we astronomers love to feel to space, one thing stands between us and the outer reaches: Earth’s atmosphere. More than 60 miles (97 kilometers) of gases separate us from the cosmos, and it has an effect on our ability to photograph and observe. Astronomers speak of two measures of atmospheric quality: transparencyContinue reading “What are transparency and seeing?”
The post What are transparency and seeing? appeared first on Astronomy Magazine.
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