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Physics, 23.08.2019 09:20 ashiteru123

Edwin hubble calculated the expansion rate of the universe. on what evidence did he base his calculation?
\l "\l " a. levels of background radiation
\l "\l " b. differences in redshift for galaxies
\l "\l " c. the existence of planets outside of our solar system
\l "\l " d. levels of helium in the universe

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Edwin hubble calculated the expansion rate of the universe. on what evidence did he base his calcula...
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