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        Part of Genius by Stephen Hawking
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        Where Did the Universe Come From? Ch. 3: Expanding universe | Genius by Stephen Hawking

        In this clip from Genius by Stephen Hawking watch how the universe is expanding at different rates. In order to work out how the universe is expanding Professor Hawking has set the three volunteers an unusual race to help visualize the question. The volunteers learn that the lightyears distance each galaxy is from Earth is an important factor as it impacts the speed at which the galaxy travels. This builds on Hubble's observations on Doppler Redshift.


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