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Quasars original

broader	Active galactic nuclei original Supermassive black holes original
narrower	Radio loud quasars original Radio quiet quasars original Broad-absorption line quasar original Double quasars original Individual quasars original Quasar-galaxy pairs original X-ray quasars original

Galaxies original

dcterms modified	2016-11-01 17:58:46Z
broader	Galactic and extragalactic astronomy original
narrower	Active galaxies original Compact galaxies original Companion galaxies original Disk galaxies original Double galaxies original Dwarf galaxies original Early-type galaxies original Elliptical galaxies original Emission line galaxies original Field galaxies original Giant galaxies original High-redshift galaxies original High-velocity stars original Infrared excess galaxies original Interacting galaxies original Irregular galaxies original Late-type galaxies original Low surface brightness galaxies original Lyman-alpha galaxies original Lyman-break galaxies original Primordial galaxies original Protogalaxies original Quasar-galaxy pairs original Radio jets original Starburst galaxies original

Quasar absorption line spectroscopy original

broader	Intergalactic medium original

Intergalactic medium original

broader	Astrophysical dust processes original Extragalactic astronomy original
narrower	Quasar absorption line spectroscopy original Dark matter original Intergalactic clouds original Intergalactic filaments original Intergalactic gas original Intergalactic medium phases original Intergalactic voids original Missing mass original

Quasar microlensing original

broader	Gravitational microlensing original

Gravitational microlensing original

broader	Gravitational lensing original
narrower	Quasar microlensing original Gravitational microlensing [Exoplanets] original

Active galactic nuclei original

broader	Active galaxies original Galaxy nuclei original High energy astrophysics original Radio sources original
narrower	Quasars original Blazars original Radio cores original Radio hot spots original Radio jets original Radio lobes original Radio plumes original Relativistic disks original

Supermassive black holes original

broader	Astrophysical black holes original
narrower	Quasars original

Radio loud quasars original

broader	Quasars original

Radio quiet quasars original

broader	Quasars original