関連ワード:
do all galaxies have black holes at the center do all galaxies have black holes at their center does every galaxy have a black hole at the center do most galaxies have black holes at their centers do irregular galaxies have black holes at the center why do galaxies have black holes at the center do all galaxies have central black holes how many galaxies have black holes at their center is there a black hole at the center of every galaxy why are black holes at the centre of galaxies
