What is a quasar

what is a quasar

Many astronomers believe that quasars are the most distant objects yet detected in the universe. Quasars give off enormous amounts of energy - they can be a. Quasars are extremely distant objects in our known universe. They are the furthest objects away from our galaxy that can be seen. Quasars are extremely bright. A quasar (/ˈkweɪzɑːr/) (also quasi-stellar object or QSO) is an active galactic nucleus of very high luminosity. A quasar consists of a supermassive black hole  ‎ Active galactic nucleus · ‎ Accretion disk · ‎ Seyfert galaxy · ‎ Luminosity. The jets that produce strong radio emission in some quasars at the centers of clusters of galaxies are known to have enough power to prevent the hot gas in those clusters from cooling and falling onto the central galaxy. Like us on Facebook. Schwarzschild Kerr Reissner—Nordström Kerr—Newman. Nur sehr kurzzeitig hell aufleuchtende Phänomene Supernova , Gammastrahlenblitz sind möglicherweise energiereicher. When we look at quasars which are billion light years away, we are looking billion years into the past. Because the nature of these objects is entirely unknown, it is hard to prepare a short, appropriate nomenclature for them so that their essential properties are obvious from their name. Privacy Policy and Important Notices. However, you can change your cookie settings at any time. Tools What links here Related changes Upload file Special pages Permanent link Page information Wikidata item Cite this page. Diese Folgerung konnte seit der Entdeckung von Gravitationslinsen unabhängig bestätigt werden. The name quasar is actually short for quasi-stellar radio source or quasi-stellar object. Indfb regionalliga nord definite identification of the radio source 3C 48 with an optical object was published by Allan Sandage and Thomas A. Quasars' luminosities are variable, with time scales that range from months to hours. Patrick Moore talks to Dr Alan Wright about the first identification of a quasar, on the basis of measurements made at the Parkes Observatory, New South Wales. Retrieved 3 October This great burst of energy results in a flare, which is a distinct characteristic of quasars. Quasars live only in galaxies with supermassive black holes — black holes that contain billions of times the mass of the sun. Search Search the BBC Search the BBC. what is a quasar

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Phil Newman If you have comments or questions about the StarChild site, please send them to us. Network Top Ten Reviews Tom's Guide Laptop Mag Tom's Hardware Business News Daily Tom's IT Pro Space. Astronomy Movies Biology Movies Concepts Movies Chemistry Movies Geology Movies Geography Movies History Movies Language Arts Movies Math Movies All Educational Movies. The greater the red shift, the farther the object is and the faster it is moving away from us. This is because quasars are so far away. The light, radiation and radio waves from these galaxies and stars being absorbed into a black hole travel billions of light years through space. Die leuchtkräftigsten Quasare erreichen bis über 10 14 -fache Sonnenleuchtkraft. In addition to radio waves and visible light, quasars also emit ultraviolet rays , infrared waves , X-rays , and gamma-rays. Dan Summons, Physics Undergrad Student, UOS, Souhampton. BBC navigation Home Home News News Sport Weather Shop Earth Travel Capital iPlayer Culture Autos Future TV Radio CBBC CBeebies Food iWonder Bitesize Travel Music Earth Arts Make It Digital Taster Nature Local Menu. A quasar consists of a supermassive black hole surrounded by an orbiting accretion disk of gas. Ein Quasar besteht vermutlich aus einem Schwarzen Loch umgeben von einer Scheibe leuchtender Materie. The term "quasar" originated as a contraction of "quasi-stellar radio source", because quasars were first identified as sources of radio-wave emission, and in photographic images at visible wavelengths they resembled point-like stars. Quasars' luminosities are variable, with time scales that range from months to hours. The quest to find a mechanism that could produce this much energy considered almost every idea imaginable. The matter accreting onto the black hole is unlikely to fall directly in, but will have some angular momentum around the black hole that will cause the matter to collect into an accretion disc. In the s, unified models were developed in which quasars were classified as a particular kind of active galaxy, and a consensus emerged that in many cases it is simply the viewing angle that distinguishes them from other classes, such as blazars and radio galaxies. Quasars emit energy across the electromagnetic spectrum and can be observed at radio , infrared , visible , ultraviolet , and X-ray wavelengths.

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