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written by Kristen Miller and Scott Miller
This tutorial begins with a description of Hubble's discovery that other galaxies exist besides the Milky Way and how these galaxies are classified.   Hubble's classification categorizes galaxies as either spiral, elliptical, or irregular.  Under these topics there is a link that gives information about the structure, components, classification system, diameter, and the average number of stars for each galaxy type.  The next section talks about the different ways that galaxies can interact, collide, or merge.  The tutorial ends with a short quiz.
Subjects Levels Resource Types
- Galaxies
= Galactic Structure
- Lower Undergraduate
- High School
- Instructional Material
= Problem/Problem Set
= Tutorial
Intended Users Formats Ratings
- Learners
- Educators
- text/html
- image/gif
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© 2000 The University of Maryland
Record Creator:
Metadata instance created March 9, 2004 by Patricia Monahan
Record Updated:
February 8, 2009 by Lyle Barbato
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Record Link
AIP Format
K. Miller and S. Miller, (2000), WWW Document, (
K. Miller and S. Miller, Introductory Astronomy: Galaxies (2000), <>.
APA Format
Miller, K., & Miller, S. (2000). Introductory Astronomy: Galaxies. Retrieved June 23, 2024, from
Chicago Format
Miller, Kristen, and Scott Miller. Introductory Astronomy: Galaxies. 2000. (accessed 23 June 2024).
MLA Format
Miller, Kristen, and Scott Miller. Introductory Astronomy: Galaxies. 2000. 23 June 2024 <>.
BibTeX Export Format
@misc{ Author = "Kristen Miller and Scott Miller", Title = {Introductory Astronomy: Galaxies}, Volume = {2024}, Number = {23 June 2024}, Year = {2000} }
Refer Export Format

%A Kristen Miller %A Scott Miller %T Introductory Astronomy: Galaxies %D 2000 %U %O text/html

EndNote Export Format

%0 Electronic Source %A Miller, Kristen %A Miller, Scott %D 2000 %T Introductory Astronomy: Galaxies %V 2024 %N 23 June 2024 %9 text/html %U

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