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<p>A supermassive blackhole at the centre of a galaxy can cause the gas that falls into it to glow SO BRIGHT that it stops the creation of new stars. What? How?<br /> <br /> Courtney Brooke Davis is here to ask the questions!<br /> Dr. Victoria Scowcroft and Dr. Carolin Villforth are here to give the answers! <br /> and I'm here to talk about pudding. </p>