Exam 16: Normal and Active Galaxies: Building Blocks of the Universe

Why is it that the quasars we see represent a time when the universe was younger?

Contrast Irr I and II in terms of structure.

Seyfert galaxies are the only type that produces gravitational lensing.

Irr II galaxies may be the result of a collision, or close encounter, of two normal galaxies.

To which portion of the Milky Way are the Magellanic Clouds most similar? Why?

There are more giant elliptical than dwarf galaxies.

Synchrotron radiation produces a(n) spectrum.

Within the boundaries of the constellations Coma and Virgo are found

How does Hubble's law relate cosmological redshift to distance?

Explain how the central engine powers an active nucleus or quasar.

The minimum period of light variations are used to find the _ _ of the central engine in galactic cores.

Dividing a distant galaxy's velocity by its distance will give you _ .

Core- dominated radio galaxies and radio galaxies with lobes are very similar in reality; we view them from different angles, which accounts for their different appearances.

On average, elliptical galaxies are richer star forming regions than spirals.

Among the ellipticals, E0 types look the most like huge globular star clusters.

How do bipolar jets relate to lobe radio galaxies?

The size of a quasar can be measured by .

Unlike spirals, elliptical galaxies do not contain a flattened disk.

Quasars can emit thousands of times as much energy as normal galaxies.

Of all the active galactic nuclei, the is the most energetic.