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A quasar (/ ˈkweɪzɑːr / KWAY-zar) is an extremely luminous active galactic nucleus (AGN). It is sometimes known as a quasi-stellar object, abbreviated QSO. The emission from an AGN is powered by accretion onto a supermassive black hole with a mass ranging from millions to tens of billions of solar masses, surrounded by a gaseous accretion disc.
Quasars are the remarkably bright cores of active galaxies in the distant universe, they are an extreme form of what astronomers call "active galactic nuclei", or AGN for...
Quasars are highly luminous objects in the early universe, thought to be powered by supermassive black holes. This illustration shows a wide accretion disk around a black hole, and depicts an...
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. The brightest quasars can outshine all of the stars in the galaxies in which they reside, which makes them visible even at.
What Is a Quasar? A quasar is an extremely luminous and active region found at the core of certain galaxies, known as active galactic nuclei (AGN). A supermassive black hole powers each quasar. The black hole has a mass ranging from millions to billions of times that of the Sun.
Quasars are the most powerful type of AGN. A Hubble Space Telescope photograph of a pair of quasars that existed when the universe was just 3 billion years old. They are embedded inside a pair of colliding galaxies. The quasars are separated by less than the size of a single galaxy.
Quasars are cores of galaxies where a supermassive black hole is messily feeding. Orbiting gas and dust whip around the black hole with such ferocity that they give off light in all wavelengths. The magnetic field of the powerful black hole traps particles from this spinning disk and expels them along its poles.
Quasars - NASA. NASA’s Hubble Sees Aftermath of Galaxy’s Scrape with Milky Way. What’s Up: November 2024 Skywatching Tips from NASA. NASA’s EMIT Will Explore Diverse Science Questions on Extended Mission. Astronomers Find Early Fast-Feeding Black Hole Using NASA Telescopes.
Quasars feed on infalling matter and unleash torrents of winds and radiation, shaping the galaxies in which they reside. Using the unique capabilities of Webb, scientists will study six of the most distant and luminous quasars in the universe.
These black holes include the some of the brightest single objects in the whole universe, and are called “quasars”, “active galactic nuclei”, and other names that describe their appearance to observers.