Quasar luminosities can vary considerably over time, depending on their surroundings. Since it is difficult to fuel quasars for many billions of years, after a quasar finishes accreting the surrounding gas and …

Dec 10, 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.

Jun 3, 2025 · Quasars occur when immense amounts of matter fall into a supermassive black hole, spiraling around it in the form of a disk before entering.

Quasars are a subclass of active galactic nuclei (AGNs), extremely luminous galactic cores where gas and dust falling into a supermassive black hole emit electromagnetic radiation across the entire …

Oct 29, 2024 · Learn what a quasar is in astronomy, how it forms, types of quasars, and what they tell us about the early universe.

Apr 14, 2025 · A quasar is an extremely bright galactic core powered by a supermassive black hole, emitting massive energy as gas spirals inward, outshining entire galaxies.

Oct 22, 2025 · Quasars, short for quasi-stellar radio sources, are extremely bright and distant celestial objects that emit massive amounts of energy. They are considered to be the most luminous objects …

3C 273 is a quasar located at the center of a giant elliptical galaxy in the constellation of Virgo. It was the first quasar ever to be identified and is the visually brightest quasar in the sky as seen from the …

4 days ago · Quasar - Discovery, Light, Galaxies: Although the first quasars known were discovered as radio sources, it was quickly realized that quasars could be found more efficiently by looking for …

Developer-oriented, front-end framework with VueJS components for best-in-class high-performance, responsive websites, PWA, SSR, Mobile and Desktop apps, all from the same codebase. Sensible …