Our Sky in 350,000,000,000 years

How did Hubble discover the expansion of the universe? Thank you to BetterHelp for sponsoring today's video. Click here for 10% off your first month - https://betterhelp.com/physicsgirl Support Physics Girl videos → https://www.patreon.com/physicsgirl Creator/Host: Dianna Cowern Editor: Levi B

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