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How can we measure what elements a star is made of without physically collecting samples?

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kaylamartin333

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tronomers finally measured the distances to a few nearby stars with ... After all, we can't go to a star, grab a sample, and bring it back to ... Solids, liquids, and dense gases emit light of all wavelengths, without any ... Each element generates its own unique set of wavelengths of ... Does that make sense?

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