“Star Clusters and How to observe them” на Mark Allison

Астрономия - Н.Николов / М.Калинков

Астрономия за 11-ти клас - Н.Николов

Астрономия за 11-ти клас - В.Голев

Митове и Легенди за съзвездията - А. Бонов

Вестник "Телескоп"

http://sites.google.com/site/barbdavid1/
http://www.mistisoftware.com/astronomy/
http://www.eso.org
http://seds.org/
http://en.wikipedia.org
http://www.astroexercisesbg.hit.bg/
http://www.daviddarling.info
http://homepage.mac.com/andjames/index.htm
http://articles.adsabs.harvard.edu/
http://antwrp.gsfc.nasa.gov/apod/archivepix.html
http://www.astro.ljmu.ac.uk/
http://adsabs.harvard.edu/abs/1986ApJ...304..273R