Quasars

Quasars

Quasars, short for quasi-stellar radio sources, are blue celestial objects that appear to be similar to stars when viewed through a telescope from earth, and are also believed to be the most distant and brightest objects in the universe. Quasars are so far away from earth, yet still send some visible light and relatively strong radio radiation.
Quasars are only a light-year or two in size, but they are up to 1,000 times brighter than galaxies that have a diameter of about 100,000 light-years.
Astronomers now believe that giant black holes are probably present in the centers of quasars, which would explain such energy generation. [VH] {SR} {EP}