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It CR Earth Science Section 1CR/Mapping the Spectra / Lesson 4
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3. Why are parsecs, megaparsecs, and gigaparsecs necessary in addition to the light-year when studying distances in space?
outside of the Milky Way qalaxy.

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It CR Earth Science Section 1CR/Mapping the Spectra / Lesson 4
Gracy
gs203258
ch...

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