Astronomers believe that it worked like it should be, because these kalaeksi have a very large black hole with tensile dudomhasan within and attracting everything towards it. Once attracted to remove matter. Or other gases inside the black hole will emit the light out.
Astronomers believe the light that it seems to be because such galaxies have a massive black hole with gravity so enormous on the inside and can attract everything toward it. When gaining a gas or other substances into the black hole to emit light out.
Astronomers believe that the brightening so probably because this galaxy is very large with a massive black hole gravity inside and can attract everything into it. When the draw took substances, gas, or other.