Eli5 why does the night sky sometime look pitch black while some time it looks like its daytime just dimmed ?
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Cloud cover. If you live in a rural area, then cloud cover might obscure the moon and make the night darker. If you live in an urban area (by contrast), low cloud cover can reflect city lights and make the nights brighter.
The phase of the moon. The moon reflects the sun’s light. In a full moon, more light is reflected and vice versa.
These would be the two biggest factors, I’d guess.
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