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Why is one half of earth alway dark?

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Anonymous

13y ago
Updated: 8/20/2019

Half of the earth is always dark because the Earth is opaque and the side facing the sun blocks sunlight from reaching the other side of the Earth. If we were in a star system with multiple stars we might have a chance of having more than half of the surface of the Earth illuminated but as we only have the one sun we will always have day and night.

Note that strictly speaking the dark side of the earth is not totally dark - it gets some reflected light from the moon most of the time and a tiny bit of light from the stars, not to mention all the anthropogenic light sources that get switched on at night.

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Wiki User

13y ago

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