When they were first discovered, quasars appeared to be____.
A) small, star-like objects associated with radio emission
B) pairs of radio sources
C) elliptical galaxies with an X-ray emitting halo
D) clouds of gas glowing with green emission lines
E) linear jets of matter
Correct Answer:
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Q22: Seyfert galaxies_.
A) often have unique shapes spectra
Q23: The energy output of a Seyfert galaxy_.
A)
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
Q28: Many galaxies with erupting black holes are
Q29: A supermassive black hole erupts when _.
A)
Q30: The formation process for supermassive black holes
Q31: Matter falling into a black hole arranges
Q32: Supermassive black holes erupt in _.
A) any
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