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Was the Milky Way Ever a Quasar?

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A quasar is an ordinary galaxy whose supermassive black hole is feeding. The infalling gas heats up so much that one tiny central point outshines its whole galaxy.

From 'Matt O’Dowd’s Favorite Object in the Universe': https://youtu.be/rDbwGDGr4e0?si=G2KfPEYgQlfspwBk

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