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| Topic | How do scientists know about the universe just by looking thru some telescope? |
| Mackorov 12/04/17 12:44:08 PM #5: | s0nicfan posted... Math, mostly. What if scientists did the maths all wrong? What if the planets don't look small because they're far away but look small because they're just that small?! ... Copied to Clipboard! |
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