How far is the moon?

How far is the moon? Why do we only see one side of the moon? How many astronauts have been on the moon?

Thanks for watching and keep looking up!

Music: Hard Boiled by Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/by/3.0/

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Please watch: "What Are Brown Dwarfs?"
https://www.youtube.com/watch?v=2ZM8wS3BqPg
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Видео How far is the moon? канала StarStuff