Exam 17: Hubbles Law and Dark Matter: the Large-Scale Structure of the Cosmos

Beyond the scale of superclusters, galaxies are randomly distributed throughout the universe.

The pregalactic blobs had masses similar to

Galactic collisions mostly involve interactions between gas and dust clouds rather than individual stars.

In its early stages, the Milky Way was probably a quasar.

If there had never been any galactic collisions, all galaxies today would probably be .

Most of the matter in the universe is dark matter.

Why do spirals seem to be more abundant on the HST deep surveys than they are in the present universe?

The type of radio galaxy that reveals its motion through the intergalactic medium is called a

To what three types of modern survivors can the masses of the protogalactic blobs be compared?

Quasars may result from the very energetic merging of in condensing galaxies.

The huge, dark, almost spherical regions between the superclusters of galaxies are called .

Based on galactic rotation curves and cluster dynamics, we think dark matter

Why do we believe galaxy clusters are rich in dark matter?

In the larger clusters, colliding galaxies tend to pass through one another.

An example of the universe's large- scale filamentary structure is the .

Virgo A (M87) is probably a dead quasar, but our Milky Way is not.

The brightest active galaxies are giant ellipticals.

The huge sheet of galaxies that spans 70 × 200 Mpc is called the _.

Mapping the intracluster gas is best done with

The primary factor for galactic evolution is .