Supermassive Black Hole at the Center of Our Galaxy May Not Be Alone SciTechDailyA second black hole at our galaxy’s center? EarthSkyNASA proved wrong? Astronomers challenge NASA on the weight of the Milky Way galaxy Express.co.ukScientists discover ‘monster’ black hole in our galaxy The Jerusalem PostDo Your Math, NASA! Scientists’ New Research on the Milky Way’s Weight Challenges the Space Agency Sputnik InternationalView full coverage on Google News