Matter Falling into a Black Hole Converts _______________ Energy into Thermal

Q58: The Doppler effect in the spectra of

Q59: Why do astronomers believe that galactic collisions

Q60: Quasars are isolated supermassive black holes, and

Q61: The formation of a galactic central bulge

Q62: Some active radio galaxies exhibit _ of

Q63: Most supermassive black holes are dormant.

Q64: Black holes erupt when matter flows into

Q65: The luminosity of a Seyfert galaxy varies

Q67: Quasars are common in the early Universe

Q68: Normal galaxies in the present never went