PKS 2131−021 is a quasar and a BL Lacerate object, [2 ] producing an astrophysical jet. [3 ] lt is located in the constellation Aquarius and classified as a blazar, a type of active galactic nucleus whose relativistic jet points in the…
^ Dreyer، J. L. E. (1878). "A Supplement to Sir John Herschel's "General Catalogue of Nebulae and Clusters of Stars"" (PDF). الأكاديمية الأيرلندية الملكية. ج. 26: 391–426.
A collection of images taken by the Chandra X-ray Observatory, including image descriptions, constellations, an X-ray sky map and comparisons with images in other wavelengths such as optical, radio and infrared.
A collection of images taken by the Chandra X-ray Observatory, including image descriptions, constellations, an X-ray sky map and comparisons with images in other wavelengths such as optical, radio and infrared.