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written by 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.
Subjects Levels Resource Types
Astronomy
- Galaxies
= Active Galaxies
- Lower Undergraduate
- Upper Undergraduate
- Instructional Material
= Problem/Problem Set
= Tutorial
Intended Users Formats Ratings
- Learners
- Educators
- text/html
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Free access
Restriction:
© 2004 Astronomy Department at the University of Maryland
Keywords:
BL Lac Objects, Double-Lobed Radio galaxies, Quasars, Seyfert Galaxies
Record Creator:
Metadata instance created March 9, 2004 by Patricia Monahan
Record Updated:
February 8, 2009 by Lyle Barbato
ComPADRE is beta testing Citation Styles!

Record Link
AIP Format
University of Maryland Astronomy Department, (2004), WWW Document, (http://www.astro.umd.edu/resources/introastro/actgal.html).
AJP/PRST-PER
University of Maryland Astronomy Department, Introductory Astronomy: Active Galaxies, (2004), <http://www.astro.umd.edu/resources/introastro/actgal.html>.
APA Format
University of Maryland Astronomy Department. (2004). Introductory Astronomy: Active Galaxies. Retrieved October 22, 2014, from http://www.astro.umd.edu/resources/introastro/actgal.html
Chicago Format
University of Maryland Astronomy Department. Introductory Astronomy: Active Galaxies. 2004. http://www.astro.umd.edu/resources/introastro/actgal.html (accessed 22 October 2014).
MLA Format
University of Maryland Astronomy Department. Introductory Astronomy: Active Galaxies. 2004. 22 Oct. 2014 <http://www.astro.umd.edu/resources/introastro/actgal.html>.
BibTeX Export Format
@misc{ Author = "University of Maryland Astronomy Department", Title = {Introductory Astronomy: Active Galaxies}, Volume = {2014}, Number = {22 October 2014}, Year = {2004} }
Refer Export Format

%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

EndNote Export Format

%0 Electronic Source
%A University of Maryland Astronomy Department,
%D 2004
%T Introductory Astronomy: Active Galaxies
%V 2014
%N 22 October 2014
%9 text/html
%U http://www.astro.umd.edu/resources/introastro/actgal.html


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Citation Source Information

The AIP Style presented is based on information from the AIP Style Manual.

The APA Style presented is based on information from APA Style.org: Electronic References.

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