What was the first evidence that quasars were different from astronomical objects before they were observed in visual wavelengths
A)The first quasars were seen to have fuzz.
B)Quasars emitted radio energy like active galaxies, but appeared to be point sources in radio wavelengths.
C)Quasars showed significant gravitational lens effects.
D)The spectra of quasars looked like that of an M dwarf.
E)The larger redshifts originally indicated that they were orbiting the center of the Milky Way.

Question

Quizplus · Accepted Answer

Early observations of quasars in radio wavelengths showed that they emitted significant amounts of radio energy like active galaxies, but appeared to be point sources. This was different from other objects in the radio sky, which tended to be extended sources. This led astronomers to think that quasars were different from known astronomical objects, which was later confirmed when they were observed in visual wavelengths.

What Was the First Evidence That Quasars Were Different from Astronomical