1
.
Describe some differences between quasars and normal galaxies.
Quasars are smaller, faster, and brighter. Normal galaxies are bigger, have shifts
between red and blue wavelength emissions, and are not as bright.
3
. In what ways are active galaxies like quasars yet different from normal galaxies?
Active galaxies and quasars are brighter, faster, and have more gas than normal
galaxies.
4
. Why could the concentration of matter at the center of an active galaxy like M87 not
be made of stars?
The surrounding aspects of the area indicate the existence of a black hole.
6
. Describe the observations that convinced astronomers that M87 is an active galaxy.
They determined this by watching the quantity of gas attracted to the center and judging
the behavior in the area led them to the decision that there was a black hole in the
center.
9
. What do we now understand to be the primary difference between normal galaxies
and active galaxies?
Active galaxies are much more similar to quasars compared to normal galaxies. They
share emission qualities.
