The Astronomy Center has provided educational resources to introductory astronomy educators since 2003. Over the past 20 years, the rapid pace of discovery has rendered some of our linked resources obsolete. Thus, the Astronomy Center will be decommissioned on March 1, 2022. Our highest quality resources will be retained on ComPADRE.org.
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the University of Maryland Astronomy Department
This site discusses the different types of active galaxies: Double-Lobed radio galaxies, Seyfert Galaxies, BL Lac Objects, and quasars. These pages discuss the structure, components, behavior, and provide an image or diagram for each type. It also provides information about the role black holes may have in understanding active galaxies and an image of a suspected black hole at core of a NGC4261. This site ends with a short quiz.
University of Maryland Astronomy Department, Introductory Astronomy: Active Galaxies (2004), <http://www.astro.umd.edu/resources/introastro/actgal.html>.
University of Maryland Astronomy Department. (2004). Introductory Astronomy: Active Galaxies. Retrieved January 23, 2025, from http://www.astro.umd.edu/resources/introastro/actgal.html
University of Maryland Astronomy Department. Introductory Astronomy: Active Galaxies. 2004. http://www.astro.umd.edu/resources/introastro/actgal.html (accessed 23 January 2025).
University of Maryland Astronomy Department. Introductory Astronomy: Active Galaxies. 2004. 23 Jan. 2025 <http://www.astro.umd.edu/resources/introastro/actgal.html>.
@misc{
Author = "University of Maryland Astronomy Department",
Title = {Introductory Astronomy: Active Galaxies},
Volume = {2025},
Number = {23 January 2025},
Year = {2004}
}
%Q University of Maryland Astronomy Department %T Introductory Astronomy: Active Galaxies %D 2004 %U http://www.astro.umd.edu/resources/introastro/actgal.html %O text/html
%0 Electronic Source %A University of Maryland Astronomy Department, %D 2004 %T Introductory Astronomy: Active Galaxies %V 2025 %N 23 January 2025 %9 text/html %U http://www.astro.umd.edu/resources/introastro/actgal.html
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