article_snippet.sent: They are extremely bright and power the centre of galaxies.
article_snippet.sent: Supermassive black holes at the centre of large galaxies could be powering blasts from deep inside the galaxy's core, astronomers have claimed.
article_snippet.sent: Astronomers have sought the driving force behind these massive molecular outflows for years, but now a team of University of Maryland scientists has found an answer.
article_snippet.sent: The huge outpourings of material are responsible for ejecting enough dust and gas to build more than a thousand stars the size of our sun every year.
article_snippet.sent: And these massive molecular outflows could also remove huge quantities of star-making gas, dictating the size, shape and overall fate of galaxies.