Soon After Discovery, It Was Observed That Quasars Had a Starlike

question 138

Multiple Choice

Soon after discovery, it was observed that quasars had a starlike appearance which was blurred by Earth's atmospheric "seeing". Despite the blurring, it was realized that the intense energy-emitting regions of quasars must be small because they

• A)have high radial velocities.
• B)are very luminous.
• C)are surrounded by quasar fuzz.
• D)radiate huge amounts of energy.
• E)fluctuate rapidly on time scales as short as a few hours.

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