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 ...

2019年1月9日 · The brilliant beacon is a quasar, the core of a galaxy with a black hole ravenously eating material surrounding it. Though the quasar is very far away — 12.8 billion light-years — astronomers can detect it because a galaxy closer to Earth acts as a lens and makes the quasar look extra bright.

2024年12月12日 · 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

2021年9月28日 · A quasar is a supermassive black hole feeding on gas at the center of a distant galaxy. Quasar is short for quasi-stellar radio source, because astronomers first discovered quasars in 1963 as objects that looked like stars but emitted radio waves.

2020年8月19日 · 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.

2024年2月20日 · New research that was published in the journal Nature Astronomy on Monday lays out the discovery of a distant quasar containing what scientists say is the fastest-growing black hole ever recorded.

2023年10月19日 · 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....

2024年10月29日 · 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 supermassive black holes devouring surrounding matter.

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.

2024年2月19日 · Quasars are the bright cores of distant galaxies and they are powered by supermassive black holes. The black hole in this record-breaking quasar is growing in mass by the equivalent of one Sun per day, making it the fastest-growing black hole to date.