00:00What if a galaxy died, but kept existing?
00:05Scientists call these strange objects zombie galaxies.
00:10Unlike normal galaxies, zombie galaxies have stopped creating new stars.
00:16They're running out of the gas needed for stellar birth.
00:20But here's the creepy part.
00:23Billions of old stars still remain, making these galaxies look alive from a distance,
00:27even though they're slowly dying.
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