Why Do We Suspect That Quasars Are the Active Centres

question 32

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.

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