Quasars. Astronomers first knew they had a mystery on their hands in the s If you'd like more information on Quasars, check out NASA's. A Galaxy Gravitational Lens · Gamma-Ray Quasars · A Quasar -Galaxy Collision? Microlensing of the Einstein Cross · A Milestone Quasar · NGC A Super. This image from Hubble's Wide Field and Planetary Camera 2 (WFPC2) is likely the best of ancient and brilliant quasar 3C , which resides. These powerful dynamos have fascinated astronomers since their discovery half a century ago. NASA - National Aeronautics and Space Administration. This name, which means star-like emitters of radio waves , was given in the s when quasars were first detected. A Question What is the average width of a quasi-stellar radio source? There was a problem with your submission. When the jets are perpendicular to our view, we see a radio galaxy. For this reason, the study of quasars can provide astronomers with information about the early stages of the universe. In fact, quasars are the intensely powerful centers of distant, active galaxies, powered by a huge disc of particles surrounding a supermassive black hole. The name is retained today, even though astronomers now know most quasars are faint radio emitters. Since their discovery in the early s, quasars, or quasi-stellar radio sources, continue to baffle astronomers. How far is an astronomical unit, anyhow? Of these very bright objects, 3C is the brightest in our skies. Quasar , an astronomical object of very high luminosity found in the centres of some galaxies and powered by gas spiraling at high velocity into an extremely large black hole. Quasars give off more energy than normal galaxies combined. These jets emit beams of radiation that can be observed at X-ray and radio wavelengths and less often at optical wavelengths. The combination of high luminosities and small sizes was sufficiently unpalatable to some astronomers that alternative explanations were posited that did not require the quasars to be at the large distances implied by their redshifts. Many astronomers believe that quasars are the most distant objects yet detected in the universe.