Seyfert galaxySey·fert galaxy
any of a number of spiral galaxies with a small, intensely bright nucleus and a spectrum with strong, broad spectral lines
Origin of Seyfert galaxyafter C. K. Seyfert (1911-60), United States astronomer who described the galaxies in 1943
A spiral galaxy having a small, compact nucleus many times brighter than the rest of the galaxy and exhibiting variable light intensity and radio emission. Seyfert galaxies are active galaxies thought to be powered by the accretion of material onto black holes in their galactic nuclei.
Origin of Seyfert galaxyAfter Carl Keenan Seyfert, (1911–1960), American astronomer.