Question

What is galactic nuclei?

Is quasar is the only galactic nuclei?​

Answer 1

Explanation:

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➺Active galactic nucleus (AGN), small region at the centre of a galaxy that emits a prodigious amount of energy in the form of radio, optical, X-ray, or gamma radiation or high-speed particle jets. Many classes of “active galaxies” have been identified—for example, quasars, radio galaxies, and Seyfert galaxies.

➺Quasars are part of a class of objects known as active galactic nuclei (AGN). Other classes include Seyfert galaxies and blazars. All three require supermassive black holesto power them. Seyfert galaxies are the lowest energy AGN, putting out only about 100 kiloelectronvolts (KeV).

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Answer 2

Active galactic nucleus (AGN), small region at the centre of a galaxy that emits a prodigious amount of energy in the form of radio, optical, X-ray, or gamma radiation or high-speed particle jets. Many classes of “active galaxies” have been identified—for example, quasars, radio galaxies, and Seyfert galaxies.

➺Quasars are part of a class of objects known as active galactic nuclei (AGN). Other classes include Seyfert galaxies and blazars. All three require supermassive black holesto power them. Seyfert galaxies are the lowest energy AGN, putting out only about 100 kiloelectronvolts (KeV).

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