1) Cosmic rarities 2) Distant starlike objects 3) Faraway lights 4) High-energy signal sources 5) Luminous cosmic objects 6) Some radio sources 7) Spatial wave senders 8) Stellar phenomena
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Quasi-stellar objects. They are believed to be among the most distant objects in the observable Universe, emitting more energy than some of the most powerful galaxies.
Found on
http://www.braeunig.us/space/glossary.htm
Compact, extra galactic, objects at extreme distances, which are highly luminous. They are thought to be active galactic nuclei. The name is an acronym for quasi-stellar radio source. A quasar is very similar to a QSO (quasi-stellar object) but gives out radio waves also.
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