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Date: 2015-03-03 23:24:11Galaxies Plasma physics Black holes Supermassive black holes Spiral galaxies Active galactic nucleus X-ray astronomy Gamma-ray burst Galaxy formation and evolution Astronomy Space Extragalactic astronomy | Active galaxies are different near and farAdd to Reading ListSource URL: phys.orgDownload Document from Source WebsiteFile Size: 33,37 KBShare Document on Facebook |