Radio observations and Hubble Space Telescope images of M84 have revealed two jets of matter shooting out from the galaxy 's center as well as a disk of rapidly rotating gas and stars indicating the presence of a supermassive black hole .
Radio observations and Hubble Space Telescope images of M84 have revealed two jets of matter shooting out from the galaxy 's centre , as well as a disk of rapidly rotating gas and stars . This suggests there is a supermassive black hole at the centre of the galaxy .