3C273
Quasar 3C273 is about 2000 million light years away from earth. A Quasars are a class of active galaxy being the most luminous of all active galaxies and are amongst the most distant astronomical objects observed.
A Quasar (quasi-stellar-object) has a very large red shift. It is not only a radio source but a X-ray source as well. It is thought that a Black Hole at the center powers the Quasar.
This image taken from the Einstein X-ray observatory shows Quasar QSO some 10,000 million light years from earth as indicated by its redshift. It lies slightly to the north and west of 3C273
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