They are not realy acual galaxies but points found in the galaxies. Points of light that radiate 100-1000 times the light of our own sun. look up the sight for Scientific American and you will get the low down on this. : If we're thinking along the same lines, then quasars (no z)are actually galaxies, not bright stars. Quasars shine so brightly that it is thought that there must be a massive black hole pulling matter inwards and producing a LOT of every type of energy, including visible light. And we're talking BIG black holes, too. I don't know if anybody has anything else to add to that.