Question 1

True or false: Seyfert galaxies are named after the astronomer who first discovered them in the 1940s.

Accepted Answer

True. Carl Keenan Seyfert first described these bright-nucleus galaxies in 1943, hence the name.

Question 2

True or false: All Seyfert galaxies are classified as Type 1 or Type 2 based on their radio jet strength.

Accepted Answer

False. The classification is based on the presence or absence of broad emission lines in their spectra, not radio jets.

Question 3

True or false: Seyfert galaxies are the most common type of active galactic nucleus in the nearby universe.

Accepted Answer

True. They are indeed the most common low-luminosity AGN within about 100 megaparsecs of Earth.

Question 4

True or false: Seyfert galaxies are entirely distinct from quasars and have no overlapping properties.

Accepted Answer

False. Seyfert galaxies are essentially low-luminosity quasars; both are AGN, just with different brightness.

Question 5

True or false: The central engine of a Seyfert galaxy is always a supermassive black hole with an accretion disk.

Accepted Answer

True. Current models show a supermassive black hole surrounded by a hot accretion disk powers the intense nuclear emission.

Question 6

True or false: Most Seyfert galaxies are elliptical galaxies, not spirals or irregulars.

Accepted Answer

False. Seyfert galaxies are almost always spiral or barred spiral galaxies; ellipticals rarely host them.

Question 7

True or false: Seyfert galaxies can sometimes change their classification from Type 1 to Type 2 over years or decades.

Accepted Answer

True. Changing obscuration or variable accretion can cause the broad-line region to disappear, shifting classification.

Question 8

True or false: The first Seyfert galaxy ever identified was Centaurus A, famous for its dramatic dust lane.

Accepted Answer

False. The first cataloged Seyfert galaxy was NGC 1068 (M77), not Centaurus A, which is a radio galaxy.

Seyfert galaxy Trivia Questions