| Link | Description |
|---|---|
| www.facebook.com/groups/felvidekimagyaramatorcsillagaszok/ | Felvidéki Magyar Amatőrcsillagászok |
| www.cloudynights.com/page/index.html | Cloudy Nights Forum |
| www.csillagvaros.hu | Csillagváros |
| www.astro-forum.cz | Astronomické fórum |
| Link | Description |
|---|---|
| weatherspark.com | WeatherSpark |
| www.shmu.sk | Slovenský hydrometeorologický ústav |
| www.sat24.com | Sat24 |
| 7timer.org | 7timer |
| Meteoblue | Meteoblue - Astronomical seeing |
| www.swpc.noaa.gov | Space Weather Prediction Center |
| radar.bourky.cz | Amateur Stormchasing Society |
| www.blitzortung.org/Webpages/index.php?lang=en&page_0=15 | Blitzortung |
| Link | Description |
|---|---|
| observing.skyhound.com/deep_sky.html | Skyhound Deep Sky |
| cometchasing.skyhound.com | Skyhound Comet Chasing |
| COBS | Comet Observation database |
| www.minorplanetcenter.org/iau/Ephemerides/Comets/index.html | Observable Comets |
| www.aerith.net/comet/weekly/current.html | Seiichi Yoshida Comet |
| www.rochesterastronomy.org/supernova.html | Latest supernovae |
| sdo.gsfc.nasa.gov/data | Solar Dynamics Observatory |
| heavens-above.com | Heavens Above |
| www.imo.net | International Meteor Organization |
| meteornews.org | MeteorNews |
| messier45.com | Messier45.com |
| www.calsky.com | CalSky |
| www.visualdeepsky.org/search.html | Internet Amateur Astronomers Catalog |
| melyeg.mcse.hu/melyeg_kalauz_2.html | Mélyég kalauz |
| www.telescope.org | Bradford Robotic Telescope |
| members.shaw.ca/rlmcnish/darksky/messierplanner.htm | Larry McNish's Messier Marathon Planner Version |
| graphitegalaxy.com | Graphite Galaxy |
| Link | Description |
|---|---|
| www.csillagaszat.hu | Csillagászat.hu |
| www.spaceweather.com | spaceweather.com |
| www.astronomiaonline.org | Astronómia On-Line |
| apod.nasa.gov/apod | Astronomy Picture of the Day |
| Link | Description |
|---|---|
| Skymaps.com | Northern Edition (PDF) -> DOWNLOAD |
| Tirion charts | Simple PDF maps |
| TriAtlas | 3 sets of PDF atlases up to 9, 11 and 13 magnitude |
| Dark Site Finder | Dark site map |
| Link | Description |
|---|---|
| The NGC/IC Project | NGC/IC/Messier/Herschel400 catalog and observing list generator |
| SEDS Messier catalog | messier.seds.org |
| SEDS Messier indexes | messier.seds.org/indexes.html |
| SEDS Deep Sky Collections and Catalogs | messier.seds.org/xtra/similar/catalogs.html |
| NGC/IC/Messier | SEDS NGC/IC/Messier catalog |
| AstroPixel's Messier Catalog | Messier Catalog with seasonal overview charts |
| AstroPixel's Caldwell Catalog | Caldwell Catalog with seasonal overview charts |
| SAC lists | Saguaro Astronomy Club downloadable object databases |
| Link | Description |
|---|---|
| stellarium.org | Stellarium |
| astroplanner.net | AstroPlanner |
| www.ap-i.net/skychart/en/start | Cartes du Ciel |
| www.hnsky.org/software.htm | Hallo northern sky |
| www.uv.es/jrtorres/CNebulaX.htm | CNebulaX |
| www.lunar-occultations.com/iota/occult4.htm | Occult - Occultation Prediction Software |
| ap-i.net/avl/en/start | Virtual Moon Atlas |
| www.alcyone.de | Alycone Astrnomy (Android) |
| Link | Description |
|---|---|
| www.bajaobs.hu | A Szegedi Tudományegyetem bajai csillagászati obszervatóriuma |
| www.mcse.hu | History of the Discovery of the Deep Sky objects |
| www.gothard.hu | Gothard Asztrofizikai Obszervatórium |
| csillagda.net | Pannon csillagda |
| www.konkoly.hu | Konkoly Thege Miklós Csillagászati Intézet |
| www.astro.cz | Česká astronomická společnost |
| www.szaa.org | Slovenský zväz astronómov |
| www.solarastronomy.sk | Solar Astronomy Senec |
| www.corvus.sk | Corvus Csillagászati Egyesület |
| www.skaw.sk | Stefan Kürti's Astro Web |
| www.daa.fmph.uniba.sk | Astronomical and geophysical observatory in Modra, Slovakia |
| RASC | The Royal Astronomical Society of Canada |
| Saguaro Astronomy Club | Saguaro Astronomy Club |
| Link | Description |
|---|---|
| messier.seds.org/xtra/history/deepskyd.html | History of the Discovery of the Deep Sky objects |