... Above and below the plane, quasars , believed to be powered by supermassive black holes , produce gamma-ray beacons at the edges of the universe. ...
... Although this galaxy's distance exceeds that of even the farthest known quasar , it is still in front of the pervasive glowing gas that is now seen as the cosmic microwave background radiation . ...
... SDSS will catalog one quarter of the sky down past 23rd magnitude ( R), obtaining redshifts for galaxies and quasars brighter than magnitude 19. ...
... Meanwhile ... have a safe, happy holiday season and Best Wishes to all from APOD ! . Tomorrow's picture: Gamma-ray Quasar . < Archive | Index | Search | ...
... is not sharp enough to resolve a lunar disk or any surface features but its sensitivity reveals the bright gamma-ray moonglow against a background of gamma rays from our Milky Way galaxy , gamma-ray quasars and some still mysterious unidentified sources ...
... Background source images that are lensed by foreground galaxies include quasars, appearing as multiple blue smudges , and galaxies, distorted into curving arcs . ...
... The VLA is continually making new discoveries, including determining the composition of galaxies , passing comets , quasars , HII regions , and clusters of galaxies . ...
... Black holes are thought to be the densest state of matter, and there is indirect evidence for their presence in stellar binary systems and the centers of globular clusters , galaxies , and quasars . ...