How did Hubble discover the expansion of the universe?
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Creator/Host: Dianna Cowern
Editor: Levi Butner
Expanding Universe Animation: Keegan Larwin
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Sources:
https://history.aip.org/exhibits/cosmology/ideas/island.htm
https://www.smithsonianmag.com/history/how-edwin-hubble-became-the-20th-centurys-greatest-astronomer-66148381/
https://books.google.com/books?id=vE91XkNA4i8C&pg=PA53&dq=edwin+hubble,+andromeda&hl=en&sa=X&ved=0ahUKEwic3PHV67LQAhUB1SYKHaE0AN4Q6AEIKDAC#v=onepage&q=edwin%20hubble%2C%20andromeda&f=false
https://www.space.com/34708-henrietta-swan-leavitt-biography.html
https://www.mtwilson.edu/building-the-100-inch-telescope/