National observatories                

Stara ZagoraNAO 'Yurii Gagarin'
VarnaNAOP 'Nikolay Kopernik'
YambolNAOP Yambol
DimitrovgradNAOP 'Jordano Bruno'
ChepelareNAO 'ROGHEN', BAS
SilistraNAO 'Galileo Galiley'
SmolianNAOP Smolian
SlivenNAO Sliven
KardgaliNAO 'Slavey Zlatev'
GabrovoNAOP Gabrovo
BelogradchikAstro observatory Belogradchik, BAS
ShumenAstro observatory of University of Shumen
SofiaDepartment Astronomy of University of Sofia
SofiaInstitute of Astronomy in BAS

Amateur observatories and clubs                

Astro observatories an planetariums in Bulgariaobservatories.hit.bg
Remote amateur observatory 'IRIDA' - Velimir Popov and Emil Ivanovwww.irida-observatory.org
'Vasil Levski' school, Troyanastrofoto.hit.bg
Astro club 'See Radiance', Burgassearadiance.hit.bg
Club 'Helios' works with the University of Aliaskaheliosclub.com
Club 'young astronomer'astronom.net76.net
Club 'Sotis' Smoliansotis.hit.bg
Astro forum 'Stellar Society'forum.starrydreams.com
Students astro observatory, Planawww.phys.uni-sofia.bg/~astro/sao.html

Astro equipment                

AndromedA Ltd.www.telescope.bg

General astro topics                

News and info for Earth-Sun systemwww.spaceweather.com
American GPS system web sitewww.gps.gov
Local information for astro eventsin-the-sky.org
Bulgarian website for building telescopesatm-bg.site40.net
Astro WIKI pagesbg.astronomy.wikia.com/wiki/Астроуики
Information about coming astronomical eventsfreestarcharts.com

Astro software                

Modern program for designing and analysing optical systemswww.myoptics.at
PlaniSphere - online starmap in many languagesdrifted.in/planisphere-app/app/index.xhtml
Astro software cataloguewww.midnightkite.com/index.aspx?URL=Software
Program for occultations processing, Hristo Pavlovwww.hristopavlov.net/Tangra/Tangra.html
Program for controlling CCD and digital cameraswww.ideiki.com/astro/Default.aspx
Several applications for ephemeris calculation and other celestial eventshttp://www.alcyone-ephemeris.info/
Windows application for full observatory controlhttp://www.omegalab-atc.com/