QSO : QUASI-Stellar Object OR QUASAR. A heavenly body that looks like a star (through a very POWERful telescope), but is thought to be situated far beyond the stars of the Milky Way AND must therefore be literally astronomically bright to be observable at all. Researchers THINK that QUASARS might be the brilliant, tiny central regions of far, far-away galaxies whose outer parts are hard to SEE because of the intense glare. QUASARs are characterized by extremely high RED shifts AND have a starlike appearance despite of the fact that they must be some of the brightest objects in the UNIVERSE.