Spirals.
Spiral galaxies
They're elliptical shaped and the typically have a red center because of all the red giants that form in this type of galaxy.
Quasars are the unusual type of active galaxy in the universe.
Depending on: - the type of the nuclear reactor - the electrical power of the nuclear reactor - the type of the nuclear fuel - the enrichment of uranium - the estimated burnup of the nuclear fuel etc.
Nuclear Fusion.
A Spiral galaxy with a central bulge [See related question]
I guess that would apply to any galaxy, since stars will have a tendency of accumulating towards the center.
The fact that the halo and bulge are made exclusively of old stars mean that those parts of the galaxy formed first and are filled with old stars
No. A Quasar is a Black hole in center of some Galaxies. I think our Galaxy has one of them.
Nuclear fusion is the type of nuclear reaction that occurs in stars. Older stars with a collapsing center can exceed a temperature of one hundred million Kelvin.
A Spiral Galaxy
Spiral galaxies.
No, an EO galaxy is not a type of elliptical galaxy. They are a lenticular galaxy.
No, a tadpole galaxy is not a type of peculiar galaxy. It is a barred spiral galaxy.
Yes. A ring galaxy is a type of peculiar galaxy.
Yes, a double galaxy is a type of peculiar galaxy.
Yes, a chain galaxy is a type of peculiar galaxy.