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Can You Pass This Elementary School Solar System Test?
by Maria Trimarchi
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Did you know that there are more stars in the universe than grains of sand on all the beaches across all of Earth? It's true! Let's see how much you know about the basics of our solar system, our galaxy, and the planetary objects we can and can't see with our eyes. (And it doesn't matter whether you were born before or after Pluto was -- and then wasn't -- and then was, maybe? -- a planet.)