Tag Archives: Cluster of galaxies

Why were astronomers originally led to believe that the energy producing region of a quasar must be small?

Chapter 17 and 18 (a) Name a galaxy besides our own that can be seen with the naked eye? (b) What do astronomers attribute the ring of the cartwheel galaxy to? (c) About how many times more luminous are powerful quasars compared to the Sun? (d) About how many times more luminous are powerful quasars […]