Seyfert galaxy
Videos
Seyfert galaxies are one of the two largest groups of active galaxies, along with quasar host galaxies. They have quasar-like nuclei with very high surface brightnesses whose spectra reveal strong, hi
The Circinus Galaxy, a Type II Seyfert galaxy
NGC 1068 (Messier 77), one of the first Seyfert galaxies classified
NGC 5793 is a Seyfert galaxy located over 150 million light-years away in the constellation of Libra.
Optical and ultraviolet images of the black hole in the center of NGC 4151, a Seyfert galaxy
Active galactic nucleus
Videos
An active galactic nucleus is a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this lumino
Seyfert galaxy
…Seyfert galaxies are one of the two largest groups of active galaxies, along with quasar host galaxies. They have quasar-like nuclei (very luminous sources of electromagnetic radiation that are outside of our own galaxy…
Quasar 3C 273 observed by the Hubble Space Telescope. The relativistic jet of 3C 273 appears to the left of the bright quasar, and the four straight lines pointing outward from the central source are diffraction spikes caused by the telescope optics.
Image taken by the Hubble Space Telescope of a 5000-light-year-long jet ejected from the active galaxy M87. The blue synchrotron radiation contrasts with the yellow starlight from the host galaxy.
Black hole Messier 87 crop max res