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written by the UNH Experimental Space Plasma Group
This online tutorial from the University of New Hampshire gives an overview of the interstellar medium. The tutorial describes what and where the interstellar medium is, how it is studied, and why it is important in astronomy. Numerous images of nebulae are included, and links to related sites provide more information.
Subjects Levels Resource Types
- Milky Way
= Interstellar Medium
- High School
- Lower Undergraduate
- Middle School
- Informal Education
- Instructional Material
= Tutorial
- Reference Material
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- Learners
- Educators
- General Publics
- text/html
- image/jpeg
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Access Rights: Free access
Restriction: © 2004 University of New Hampshire Experimental Space Plasma Group
Has a copyright or other licensing restriction.
Keywords: dust, gas, particles
Record Creator: Metadata instance created March 2, 2004 by Kara Lehman
Record Updated: Mar 03, 2010 by Lyle Barbato
Other Collections:

composition of ism

Author: William H. Waller
Posted: July 18, 2004 at 4:00PM
Source: The Astronomy Center collection

Please check your compositional percentages.
They should be more like 75% hydrogen and
25% helium by mass -- not 90% and 10% as I
read during a tour of

Bill Waller
Tufts University

» reply

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Record Link
AIP Format
Experimental Space Plasma Group, (2004), WWW Document, (
Experimental Space Plasma Group, The Interstellar Medium, (2004), <>.
APA Format
Experimental Space Plasma Group. (2004). The Interstellar Medium. Retrieved July 28, 2016, from
Chicago Format
Experimental Space Plasma Group. The Interstellar Medium. 2004. (accessed 28 July 2016).
MLA Format
Experimental Space Plasma Group. The Interstellar Medium. 2004. 28 July 2016 <>.
BibTeX Export Format
@misc{ Author = "Experimental Space Plasma Group", Title = {The Interstellar Medium}, Volume = {2016}, Number = {28 July 2016}, Year = {2004} }
Refer Export Format

%Q Experimental Space Plasma Group
%T The Interstellar Medium
%D 2004
%O text/html

EndNote Export Format

%0 Electronic Source
%A Experimental Space Plasma Group,
%D 2004
%T The Interstellar Medium
%V 2016
%N 28 July 2016
%9 text/html

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