Nebula in galaxy M Hubble Space Telescope HST image showing clouds of gas in the nebula NGC This nebula is a region of intensive star formation At the centre are more than hot stars each to times more massive than our Sun High energy ultraviolet light from these stars heat the gas of the nebula and make it fluoresce NGC is about light years across making it a peculiarly large nebula It is situated in a galaxy called M found about million light years away in the direction of the constellation Triangulum This image was made on January