The observed characteristics of a quasar are a
A) diffuse circular image, no redshift of the spectrum, and often a very bright radio source.
B) starlike image, with a highly variable Doppler spectrum that shifts from red to blue, and often a very bright radio source.
C) starlike image, a highly redshifted spectrum, and sometimes an intense radio emitter.
D) starlike image, an extremely blueshifted spectrum, and often an intense radio emitter.
Correct Answer:
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