Multiple Choice
Why do we suspect that quasars are the active centres of galaxies?
A) "Fuzz" around the central luminous regions looks like a collection of normal stars.
B) A few quasars have large redshifts.
C) The central regions of some quasars fluctuate rapidly.
D) Quasars emit large amounts of X-rays.
Correct Answer:

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Correct Answer:
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