The words "elliptical", "irregular" and "peculiar" are used to classify galaxies based on ___
In the 1960s, the peculiar object 3C273 was eventually determined to be ___
Compared to our Sun, how much more energy is blasted out by 3C273, the brightest quasar in the sky?
The most powerful energy source in the entire cosmos was dubbed, for short, a ___
Galaxies that emit x-rays and gamma rays were given the generic name ___
Which telescope was first used to search for evidence of black holes at the cores of galaxies?
What appears to be at the heart of every big galaxy we see?
The flat disk of material that swirls around a black hole at ferocious speeds is called ___
In which direction do active galaxies launch beams of matter and energy?
If the poles of an active galaxy are aimed right at us, we see ___
A black hole, like the one in the Milky Way, that is not actively feeding is said to be ___
One way to flip a quiescent black hole from a baby to a monster is through ___
Our Milky Way is part of a small knot of a few dozen galaxies that we call ___
Which two galaxies completely overpower the Local Group?
The spectrum of the Andromeda Galaxy is blue-shifted, which means it's ___
What name is given to the merger of the Milky Way and the Andromeda Galaxy?
Located about 50 million light years away, what is the nearest galaxy cluster to us?
What sits right at the center of many galaxy clusters?
Clusters of galaxies themselves fall into even bigger groups called ___
Superclusters appear to fall along tremendously long, interconnected and intersecting ___
In between the galactic filaments are vast regions relatively empty of galaxies called ___
What image, taken in 1995, shows a small grain of the sky filled with thousands of galaxies?