In Active Galaxies, Their Central Engines May Be Temporarily Fed

question 106

Multiple Choice

In active galaxies, their central engines may be temporarily fed by:

• A)a sudden surge of star formation.
• B)a series of supernovae around the core.
• C)the sudden collapse of the core into a supermassive black hole.
• D)a close encounter with a neighbor galaxy.
• E)the fusion of helium into carbon in their cores.

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