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Rigorous Science To make a blue moon, what element does it need?

We know that Mars has a reddish color, because its ground consists of iron-based compounds. The moon is grey-whiteish because it consists mostly of silicon-based compounds. What element should the...

1 answer  ·  posted 5y ago by Mr.D‭  ·  last activity 5y ago by Mr.D‭

Question astronomy moons geology unusual-color