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Black holes may halt stellar factories: galaxies stop forming stars despite access to raw materials.
Supermassive black holes might slowly suffocate galaxies. Researchers have found a cache of galaxies loaded with cold gas that aren't making stars, running counter to astronomers' notion that galaxies stop birthing stars when they run out of cold gas. The team's observations suggest that the galaxies' central black holes stirred up the gas and shut down the stellar assembly lines.
Over the last decade, astronomers have learned that black holes can drive the fates of...
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