1.The pregalactic blobs had masses similar to

1.Galaxies evolve by

1.Astronomers believe that a spiral galaxy may form

1.Active galaxies are having their central engines temporarily fed by what occurrence?

1.The further away a galaxy is

1.What is true of spiral galaxies?

1.What is the Great Wall?

Most galaxies in the Local Group are:

That quasars were at cosmological distances yet appeared like ordinary faint stars meant:

The Tully-Fisher relation exists between the galaxy’s luminosity and its