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 …

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Mar 19, 2025 · 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.

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 …

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 …

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....

Oct 29, 2024 · A quasar, short for “quasi-stellar radio source,” is the brightest and most energetic object in the universe. Quasars are the active cores of distant galaxies, powered by …

Dec 5, 2024 · Astronomers have used the unique capabilities of NASA's Hubble Space Telescope to peer closer than ever into the throat of an energetic monster black hole powering a quasar. …

Aug 19, 2020 · Quasars—accreting supermassive black holes—are paradoxically some of the brightest objects in the universe. Astronomers widely consider the energy from quasars to be …

Quasars are amongst the most luminous objects in the known Universe, typically emitting thousands of times more light than the entire Milky Way. They are distinguished from other …