Astronomers have used ESA's Herschel Space Observatory to solve a decades-old mystery about the origin of powerful cool gas winds in the hot environs of quasars. The evidence linking these powerful winds to star formation in the Quasar host galaxies may also help resolve the mystery of why the size of galaxies in the Universe appears to be capped. This image is an artist's impression of a radio-loud quasar in a star-forming galaxy....

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