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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Definitions:

Fight-Or-Flight

A physiological reaction that occurs in response to a perceived harmful event, attack, or threat to survival.

Parasympathetic

Part of the autonomic nervous system that conserves energy and slows the heart rate, among other functions.

Splanchnic Nerves

Nerves that convey information about the nutrient contents of the stomach to the brain and are responsible for providing autonomic nervous system control to the abdomen.

Collateral Ganglia

Collections of nerve cell bodies located in the peripheral autonomic nervous system, involved in transmitting nerve signals to organs.