ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
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A new issue of the Universe in the Classroom is now available:
http://www.astrosociety.org/education/publications/tnl/72/ 
darkmatter.html

Invisible Galaxies: The Story of Dark Matter
by Matthew Craig and Sarah Schultz

Dark matter makes up 80% of the matter in the universe, yet it is  
invisible and we're not quite sure what it is. So how do we know that  
it's there? How does its existence affect the evolution of the  
universe? Find out in the latest issue of the Universe in the  
Classroom, where you will also find classroom activities and a list  
of additional resources related to dark matter.

Topics include:

    * What is the Universe made of?
    * If we can't see dark matter, how do we know it's there?
    * What other astronomical objects have we discovered without  
seeing them first?
    * The motion of galaxies
    * How can we detect dark matter?
    * Links to two classroom activities about dark matter

http://www.astrosociety.org/education/publications/tnl/72/ 
darkmatter.html


If you missed our last issue, "How Fast Are You Moving When You Are  
Sitting Still?" by Andrew Fraknoi, you can find it, along with all  
the past issues back to 1984, in our archive:
http://www.astrosociety.org/education/publications/tnl/tnlarchive.html




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Anna Hurst
Astronomical Society of the Pacific
390 Ashton Ave.
San Francisco, CA 94112
415-337-1100 ext. 108
[log in to unmask]

www.astrosociety.org/afgu
www.astrosociety.org/uitc
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