Question

What is a quasar? Explain.

Answer 1

Shining so brightly that they eclipse the ancient galaxies that contain them, quasarsare distant objects powered by black holes a billion times as massive as our sun. Astronomers called them "quasi-stellar radio sources," or "quasars," because the signals came from one place, like a star

Answer 2

A quasar is an extremely luminous active galactic nucleus (AGN). It has been theorized that most large galaxiescontain a supermassive central black holewith mass ranging from millions to billions of solar masses. In quasars and other types of AGN, the black hole is surrounded by a gaseous accretion disk. As gas in the accretion disk falls toward the black hole, energy is released in the form of electromagnetic radiation. This radiation can be observed across the electromagnetic spectrum at radio, infrared, visible, ultraviolet, and X-ray, and gamma wavelengths.



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