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OpenStudy (anonymous):

is there a modern telescope that has been used to advance our understanding of the universe in the last 100 years

OpenStudy (anonymous):

I would have to say Mount Palomar, the Wilson Telescope at this observatory was used by Edwin Hubble who realised that "spiral nebulae" are actually galaxies like our own and that the universe is expanding. I believe this is one of the most important discoveries in the history of mankind.

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