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1. http://www.intercom.net 2. http://www.skyimagelab.com 3. http://www.seds.org 4. http://www.starlore.net 5. http://www.physics.gmu.edu 6. http://www-ssg.sr.unh.edu 7. http://nineplanets.org 8. http://homepage.mac.com 9. http://www.wordiq.com 10. http://www.gb.nrao.edu 11. http://www.solarius.com 12. Sky Catalogue 2000.0 Volume 1: Stars to magnitude 8.0, Alan Hirshfeld, Roger W. Sinnott,1982 Cambridge University Press and Sky Publishing Corporation 13. A Messier-Album, John H. Mallas-Evered Kreimer, Gondolat, Budapest, 1985 14. Astronomia 11. klas, Valeri Golev, Prosveta, Sofia, 2004 15. Astronomia 11. klas, Nikola Nikolov, Valeri Golev, Todorka Stefanova, Elisaveta Ilieva, Prosveta, Sofia,1991 |