Observation 4.1: Astronomy Cast Episode 98

The topic of this episode of the Astronomy Cast is Quasars. Quasars were first discovered in the 1950's using radio telescopes, and 30 years later it was determined that Quasars were located in the center of galaxies. Because of this, and the knowledge that Quasars matched with stars, the existence of super massive black holes in galaxies was theorized. Upon their initial discovery, however, the existence of quasars was not widely accepted; it took many years and additional findings before most astronomers came to understand the role they played.