- Quasar - Wikipedia
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 dust, it becomes an ordinary galaxy
- Quasar Framework
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- Hubble Quasars - NASA Science
Quasars occur when immense amounts of matter fall into a supermassive black hole, spiraling around it in the form of a disk before entering
- Quasar | Discovery, Structure Evolution | Britannica
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
- Quasars: Brightest Objects in the Universe
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 An active galaxy
- Quasar – Definition, Formation, Facts in Astronomy
Learn what a quasar is in astronomy, how it forms, types of quasars, and what they tell us about the early universe
- What Is a Quasar? The Answer Depends on Your Point of View
Many of those newfound objects were incredibly far away and therefore extremely luminous, but looked so much like stars that they were dubbed quasi-stellar radio sources, or quasars for short
- Quasar - ESA Hubble
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 electromagnetic spectrum
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