Thanks

Hi -- Thanks for making your image of the large-scale structure of the universe (http://en.wikipedia.org/wiki/File:Universe_Reference_Map_%28Location%29_001.jpeg) available on WP with a free license! I've used it in my book on general relativity at http://www.lightandmatter.com/genrel/ , on page 18. The book is under the same CC-BY-SA license as WP. You are credited in the back of the book in the book in the photo credits section, and the licensing info is listed there. Regards, Ben