Quasar - Wikipedia
A quasar (/ ˈ k w eɪ z ɑːr / 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 ...
Quasar | Discovery, Structure & Evolution | Britannica
3 days ago · 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
Quasars — Everything you need to know about the brightest …
Oct 19, 2023 · 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 short....
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NASA’s Hubble Takes the Closest-Ever Look at a Quasar
Dec 5, 2024 · The quasar in the new study, 3C 273, was identified in 1963 by astronomer Maarten Schmidt as the first quasar. At a distance of 2.5 billion light-years it was too far away for a star. It must have been more energetic than ever imagined, with a luminosity over 10 times brighter than the brightest giant elliptical galaxies.
What is a quasar? - EarthSky
Feb 28, 2021 · The word quasar stands for quasi-stellar radio source. Quasars got that name because they looked starlike when astronomers first began to notice them in the late 1950s and early 60s.
NASA's Webb to Study Quasars and Their Host Galaxies in Three ...
Aug 19, 2020 · This energy creates a brilliant and powerful galactic core called a quasar, whose light can greatly outshine its host galaxy. Quasars—accreting supermassive black holes—are paradoxically some of the brightest objects in the universe.
Hubble Quasars - NASA Science
Oct 9, 2024 · Among its quasar observations, in 2019 Hubble found the brightest quasar known in the early universe by using a combination of its sharp vision and a natural gravitational lens in space to see the distant object.
NASA’s Webb Will Use Quasars to Unlock the Secrets of the Early ...
Jun 23, 2021 · 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.
Quasars & Other Active Black Holes - Center for Astrophysics
Surveying quasars to map the very distant universe. The Baryon Oscillation Spectroscopic Survey (BOSS) is an ongoing project to map galaxies and active galactic nuclei, to improve our techniques of measuring cosmic distances, as well as to …