galaksi 77Para astronom menemukan lubang hitam supermasif yang tersembunyi di balik cincin debu Galaksi Messier 77 M77. Kiri: Galaksi spiral aktif Messier 77 atau M77 dengan pusat galaksiAs other active galactic nuclei, the central region of Messier 77 is powered by a black hole that is surrounded by a thin accretion disc, which