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Astronomy Magazine on Twitter: "Astronomers measure things in light-years, astronomical units, and solar masses. Is it time to stop? https://t.co/nPuCPQ3Wtc https://t.co/oNTrCNpmnw" / Twitter
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Relativity physics - When you talk about any Planet or Star and say that is 100 light years away from planet earth... Then no wonder many peoples Would think about what is
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