Position	Website	Change	Thumbnail
1	amazon.com - Amazon.com: Online Shopping for Electronics, Apparel, Computers, Books, DVDs & more Online shopping from the earth's biggest selection of books, magazines, music, DVDs, videos, electronics, computers, software, apparel & accessori...	7
2	textbooks.com - Textbooks.com: Cheap Textbooks & Used College Textbooks. Buy Textbooks, Sell Textbooks or Rent T... Save up to 90% off Textbooks plus Fast Free Shipping. Browse the largest selection of new and used textbooks online, rent textbooks or sell your colle...	0
3	coursera.org	0
4	astronomynotes.com - Astronomy Notes	0
5	mhhe.com	0
6	planetary.org - The Planetary Society	24
7	adsabs.harvard.edu - SAO/NASA ADS: ADS Home Page	0
8	astrosociety.org - Astronomical Society of the Pacific The Astronomical Society of the Pacific increases the understanding and appreciation of astronomy by engaging scientists, educators, enthusiasts and t...	-6
9	fridaycenter.unc.edu - The William and Ida Friday Center for Continuing Education	15
10	cseligman.com - Courtney Seligman, Professor of Astronomy, Author Online astronomy text and sky atlas, and fiction by Courtney Seligman, Professor of Astronomy	-9
11	physics.stackexchange.com - Physics - Stack Exchange	-8
12	highered.mcgraw-hill.com - Your Page Title	-5
13	answers.yahoo.com - Yahoo! Answers - Home Yahoo! Answers is a new way to find and share information. You can ask questions on any topic, get answers from real people, and share your insights a...	0
14	archive.org - Internet Archive: Digital Library of Free Books, Movies, Music & Wayback Machine Internet Archive is a non-profit digital library offering free universal access to books, movies & music, as well as 150 billion archived web page...	2
15	space.about.com - Space & Astronomy at About.com A site for students, educators and anyone else interested in space and astronomy to learn about the wonders of our Universe.	-1

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