TIL that just less than a century ago, astronomers weren’t sure that the universe expanded beyond the Milky Way. Edwin Hubble (for whom the Hubble telescope was named) definitively proved the universe was far more vast.

Read more: https://asd.gsfc.nasa.gov/archive/hubble/overview/hubble_bio.html#:~:text=Edwin%20Hubble%2C%20for%20whom%20the,and%20our%20place%20within%20it.

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