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David Butler's How Far Away Is It - You-tube series for Astronomy Nerds

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Havan_IronOak:
Just watched David Butler's "Video book", How Far Away Is It for the umpteenth time.

If you consider yourself a science nerd (or an astronomy nerd in particular) or ever wondered why they call it a "Parsec" you really should watch this.

list=PLpH1IDQEoE8QWWTnWG5cK4ePCqg9W2608

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