Quasars

Since Quasar's discovery, the essence of Quasar was one of the most interesting and confusing issues, as demonstrated in the following quotation. "Understanding the problem of quasi-stellar objects is one of the most important and interesting tasks in all physics" - G. Burbidge and Hoyle. "Quasar is one of the most confusing things in the universe and it will continue to be one of the most interesting things." - Morrison. "The problem of redshifts is one of the most serious problems in today's literature." - G

The quasar is far away, and the quasar discovery survey shows that quasar activity is more common in distant past. The peak period of Quasar activity is about 10 billion years ago. As of 2017, the most distant known quasar is ULAS J1342 + 0928, redshift z = 7.54, and when the universe reaches only 690 million years, the light observed from this quasar is emitted. This quasar's extraordinary black hole is presumed to have 800 million solar masses and is the furthest black hole ever discovered.

Quasar is the brightest and furthest object in the known universe. In the early 1960's, Quasar was known to be a powerful source of radio waves, so it was called a radio star. In fact, the term quasar comes from the term "quasi-stationary wireless power". Today, many astronomers refer to these objects as quasi-stellar objects or QSOs. Please note that as our resolution of the radio telescope and the optical telescope improves, these are not real stars, but some kind of star celestial bodies that are not known yet. The radio seems to radiate a pair of lobes from these faint star objects. They also found out to be outside our own galaxy. Quasar is a very mysterious thing. Today astronomers still can not be sure what these objects are. Our understanding is that they release huge energy. They can burn billions of sun's energy

Radio telescope can also detect quasars. The term quasar is an abbreviation for quasi-station radio source. The name comes from the fact that the originally confirmed quasars are mainly emitting radio energy and look like stars. Quasar is very energetic, and some emit more than 1000 times more energy than the whole Milky Way. However, most quasars are blocked by the visible dust of the surrounding galaxies. Astronomers use the VLA radio telescope's radio data to determine quasars, as many quasars with many quasars look bright when looking at the radio telescope. In the lower false color image, the infrared data from the Spitzer Space Telescope is color coded into blue and green, and the radio data from the VLA telescope is displayed in red. Quasar Galaxy emits infrared rays and radio waves, so it is highlighted in yellow.