"Sgr A*" . . "supermassive black hole at the Milky Way galactic centre" . "supermassive compact object" . "in the Milky Way's galactic center" . "Sagittarius A* (SMBH in Milky Way)" . . "a supermassive compact object" . "black hole at the center of our galaxy" . "Sagittarius A*" . . "central black hole of the Milky Way" . . "Sagittarius A* (Sgr A*)" . . "black hole at the center of the galaxy" . . . "Sagittarius_A*" . . . "central supermassive black hole" . "S star" . . . . "Milky Way black hole" . "the black hole at our Milky Way's center" . . . . . "supermassive black hole" . "S4714" . "Sgr A*" . "the supermassive black hole" . "Sagittarius A*" . "supermassive black hole at the Galactic Center" . "supermassive black hole at the center of the galaxy" . . "Sagittarius A*#Discovery of G2 gas cloud on an accretion course" . "galactic center" . "a supermassive compact object at the centre of our galaxy" .