Prior to 1963 the extragalactic radio sources were almost all identified with giant elliptical galaxies. This was all to be changed in an unexpected way when the radio source 3C2 G was oc ulted by the moon. The occultation was observed by Cyril Hazard 1 using CSIRO's Parkes radio telescope. It showed an unresolved flat spectrum core with a steep spectrum 20" jet. The morphology and position clearly identified this strong but previously unidentified radio source with a bright 13 magnitude star and a wisp jet) of optical emission in the same location as the radio jet. Martin Schmidt obtained an optical spectrum of the star and interpreted the lines as having a redshift corresponding to a recession velocity of 0.15 of the speed of light l18], implying unprecedented optical luminosity comparable to an entire galaxy but coming from a region as small as a star. This was the first quasar. This discovery was the trigger for the first Texas Symposium on Gravitational Collapse and Relativistic Astrophysics i19]. Only a super-massive black hole could provide the energy required from such a small volume. This was a paradigm shift in astronomy and the process of unravelling the role of super-massive black holes in the evolution of the Universe continues to this day