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Listen to native speakers pronounce “hubble constant” in real conversational contexts with synchronized timestamps and subtitles.
Do you actually observe two stars slowly moving further from each other The Big Bang theory indicates that the universe started small and has been expanding.And there is a expansion rate called Hubble constant, which you might have heard from school.The observable evidence was found by Hubble in 1929. A galaxy refers to a group of stars in the universe.
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