Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. Surprisingly, city lights make this task quite possible. The above picture is actually a composite of over 200 images made by satellites orbiting the Earth . Operational Linescan System. The DMSP satellites continue to help in the understanding and prediction of weather phenomena as well as provide key information about population patterns , city light levels , and even rural forest fires .
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