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 …

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...

2021年2月28日 · 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 …

2025年2月8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 …

2024年10月29日 · Quasars are the active cores of distant galaxies, powered by supermassive black holes devouring surrounding matter. First discovered in the 1950s and early 1960s, …

2024年10月9日 · 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. …

2019年7月1日 · Quasars, short for quasi-stellar objects, were first identified in 1962 by Maarten Schmidt at the California Institute of Technology. They appear as star-like points, but they lie …

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 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 …

2024年8月27日 · 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. Quasars …