The energy output of a Seyfert galaxy____.
A) changes slowly with a period of weeks
B) is a hundred times the luminosity of the entire Milky Way
C) is noticeable only in the infrared
D) comes from starburst effects
E) is concentrated in the spiral arms
Correct Answer:
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Q18: Collisions in the early Universe were rare.
Q19: The broad emission lines of Seyfert galaxies
Q20: Quasars are caused by galaxy collisions in
Q21: Quasars have a(n) _.
A) extremely high blueshift
B)
Q22: Seyfert galaxies_.
A) often have unique shapes spectra
Q24: Seyfert galaxies are always _ galaxies.
A) dwarf
B)
Q25: The high luminosity of a Seyfert galaxy_.
A)
Q26: Gas falling into a black hole becomes
Q27: When they were first discovered, quasars appeared
Q28: Many galaxies with erupting black holes are
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