This site is built with open source software and lots of creative commons and public domain artwork.  Here is a repository of artwork used and a link to the various software packages used to create and maintain the site.

Artwork

This image was created by NASA and is public domain, it is available aalso at the wikicommons.

This image is public domains from the wikicommons.

I found this public doiman image on the open clip art website!

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