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A childhood belief about outer space

I was taught in elementary school (I never figured out if the teacher was lazy or just did not understand it herself) that the reason the moon has phases is that half of it is smooth and half of it is pock-marked (That half got hit with asteroids). As the moon turns, only the shiny side reflects light. So when the shiny side is facing you all the way, you get a full moon and so on. I'm ashamed how long I believed that without questioning it.

Anon

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