ATMOSPHERIC SCIENCE

The atmosphere is the key to life on Earth. This thin layer is what protects us from the hostile environment of space. Here you can learn all about the atmospheric sciences.
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Why does the sky get dark at night?

Why does the sky get dark at night? Don't tell me it's just because the Earth rotates and the sun sets -- what I mean is, with all of its stars and other luminous bodies, why isn't the universe infinitely bright?

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