: any of a class of spiral galaxies that have small compact bright nuclei characterized by variability in light intensity, emission of radio waves, and spectra
called also Seyfert
Examples of Seyfert galaxy in a Sentence
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It is also known as a Seyfert galaxy or a galaxy with an active nucleus.
—
Discover Magazine, 6 Feb. 2024
Further, the galaxy NGC 5495 is considered a Seyfert galaxy, with an active galactic nucleus at its core.
—Joshua Hawkins, BGR, 3 Nov. 2022
The dominant member of the Perseus Cluster, Perseus A is a Seyfert galaxy with an active nucleus, powered by a 340-million-solar-mass black hole in its core.
—David J Eicher, Discover Magazine, 19 May 2020
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Discover Magazine, 6 Feb. 2024
Further, the galaxy NGC 5495 is considered a Seyfert galaxy, with an active galactic nucleus at its core.
—Joshua Hawkins, BGR, 3 Nov. 2022
The dominant member of the Perseus Cluster, Perseus A is a Seyfert galaxy with an active nucleus, powered by a 340-million-solar-mass black hole in its core.
—David J Eicher, Discover Magazine, 19 May 2020
Cite this Entry
“Seyfert galaxy.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Seyfert%20galaxy. Accessed 3 Jul. 2025.
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