Eli5: Moon Phases

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Can someone please explain how/why we see the different phases of the moon (ie. Quarter, half, full, new, etc.). Where is the sun in relation to the moon and earth to produce the different moon phases? Thank you eli5! Bonus points for poorly drawn pictures.

In: Physics

2 Answers

Anonymous 0 Comments

In a room with one light source, hold up a round object of some sort in front of you. Turn around. Note that half of the object is lit. But

* when you’re facing the light source, you don’t see that half;
* when you’re facing away, you see all the lit side;
* when you’re in between, you see part of the lit and part of the dark.

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