関連ワード:
do all galaxies have black holes at their center do all galaxies have black holes at the center do most galaxies have black holes at their centers does every galaxy have a black hole at the center do irregular galaxies have black holes at the center why do galaxies have black holes at the center not all big galaxies have black holes at their center do all galaxies have a supermassive black hole in their galactic center how many galaxies have black holes at their center are black holes always in the center of galaxies
