section_path: Variants/Active galaxy/Other AGNs
section_name: Other AGNs
paragraph_text: Other AGNs
  
  Blazars are believed to be active galaxies with a relativistic jet pointed in the direction of Earth. A radio galaxy emits radio frequencies from relativistic jets. A unified model of these types of active galaxies explains their differences based on the observer's position.
  
  Possibly related to active galactic nuclei (as well as starburst regions) are low-ionization nuclear emission-line regions (LINERs). The emission from LINER-type galaxies is dominated by weakly ionized elements. The excitation sources for the weakly ionized lines include post- AGB stars, AGN, and shocks. Approximately one-third of nearby galaxies are classified as containing LINER nuclei.