What is the difference between a Seyfert galaxy and other AGNs?
A)Seyferts are always spirals; other AGNs are always elliptical.
B)Seyferts always have broad emission lines; other AGNs can have lines that are broad or narrow.
C)Seyferts are basically like other AGNs, only closer to us.
D)Seyferts are the only radio-loud AGNs that are spirals.

Question

Quizplus · Accepted Answer

Seyfert galaxies are a subclass of active galactic nuclei (AGNs) characterized by their bright cores and spectral lines. The primary difference between Seyfert galaxies and other AGNs is not their shape, emission line width, or radio loudness, but rather their proximity to us. Seyfert galaxies are simply AGNs that are closer to Earth, making them easier to study in detail. Other AGNs can also be found in spiral galaxies, can have both broad and narrow emission lines, and can vary in their radio emissions.

What Is the Difference Between a Seyfert Galaxy and Other