When the supermassive black hole starts to devour material and produce an AGN, shock waves and jets may rip through the galaxy.Gas piles up along shock fronts and condenses into stars.

• 当超大质量黑洞开始吞噬物质而形成AGN时，它的震波和喷流将会划破这个星系，气体会集结在震波前缘，凝聚成恒星。