WARNING!!!

One can spend hours in each of the locations below!

• American Association of Variable Star Observers
• AAVSO VSX query form | WebObs - Submit Data | Download APASS data
• ALPO (Association of Lunar and Planetary Observers)
• Amateur Astronomy Clubs
• Andrew Lowe's Minor Planet Home Page
• Asteroid Dynamic Site AstDyS
• Astronet (Russia)
• Astronomer's Telegram (ATEL)
• Astronomical Centre at Montecatini (Italy)
• Astronomy in Siberia
• Astronomy Discussion Page
• Astronomy Picture of the Day
• AstroForum at StarLab (Russia)
• Astrophotographer Portrait Page
• Astrostudio by Gerald Rhemann (Austria)
• All-Sky Automated Survey
• ASAS-SN project | ASAS-SN Transients | ASAS-SN Sky Patrol
• ATLAS project | Forced Photometry Server
• Bill Arnett's Astronomy Page
• Bradford Robotic Telescope
• British Astronomical Association
• CalSky
• Cambridge Conference Network archive
• Cassini-Huygens Home Page
• CASU Astronomical Data Centre
• Catalina Real-Time Transient Survey | CRTS Search Form
• Center for Archaeoastronomy
• Center for Backyard Astrophysics
• Christian Buil's Home Page
• Comets Mailing List
• CVnet Page by Mike Simonsen
• CVNET-discussion archive | CVNET-outburst archive
• DASCH Project at Harvard
• DSS Plate Finder at STScI
• Deep Impact mission Home Page
• Earth and Sky
• Ephemeris Generator
• ESO Online Digitized Sky Survey
• European Meteosat Images
• Exoplanets Catalog
• Gaia Alerts
• Galactic Extinction Calculator
• GALEX Search Form
• Gamma-Ray Burst Coordinates Network
• General Catalogue of Variable Stars
• Great Shefford Observatory by Peter Birtwhistle (UK)
• GSC 2.3.2 Query Form
• Heidelberg Digitized Astronomical Plates
• Hubble Space Telescope images by subject
• Hubble Space Telescope Latest Images
• INTEGRAL OMC Archive
• Interactive 2MASS Image Service
• IOTA (International Occultation Timing Association)
• IOTA European Section
• IPHAS Data Access
• iTelescope Network
• James Webb Space Telescope
• James Young's Astronomy Photograph Gallery
• JPL Small Body Database Search
• Ka-Dar - first private public observatory in Russia
• Kepler Light Curve Viewer
• Largest Telescopes
• Light Curves of Asteroids
• LINEAR Survey Photometric Database
• Major News About Minor Objects
• Mars Exploration Rover Mission
• Mars Meteorite homepage - Life on Mars?
• Meteorite Page
• Minor Planet Center
• Minor Planet Checker
• Minor Planet and Comet Ephemeris Service
• Minor Planet Mailing List (MPML)
• Moscow Astronomical Institute GAISH (Russia)
• Moscow Astronomy Club
• Moscow Planetarium
• NASA Astronomy Headlines
• NASA Extragalactic Database (NED)
• Near-Earth Object Program
• NEO Confirmation Page
• NEO Dynamic Site NeoDyS
• New Horizons Web Site
• Night Sky Live (ConCam) project
• Noctilucent Cloud Observing
• Noctilucent Cloud WWW page
• Northern Sky Variability Survey
• PanSTARRS Catalog Search | PanSTARRS-1 Image Access
• Pepe Manteka Home Page - Comets and NEOs
• Period Search Service by Kirill Sokolovsky
• Planetariums
• Planetary Nebulae Gallery
• Real Time Satellite Positions
• Satellite Predictions for ANY location on Earth
• Scout: NEOCP Hazard Assessment
• SIMBAD: Query by Coordinates | Query by Name
• SkyMorph - archive of NEAT images
• SkyPhotos
• Sky and Telescope
• Sky Router
• Sloan Digital Sky Survey | SDSS Catalogue Query Form | SDSS DR8 Query | SDSS DR9 Query | SDSS DR10 Query
• Society for Popular Astronomy
• SpaceWeather
• Space Telescope Science Institute
• STScI Digitized Sky Survey
• Stargazer (Zvezdochet) magazine (Russia)
• Sunspots
• Supernovae | Mirror
• SuperWASP database
• Transient Name Server
• Transient Objects Confirmation Page (CBAT TOCP)
• Two Micron All Sky Survey (2MASS) Catalogue Query Form | CfA Mirror
• UCAC2 Catalogue Query Form
• USNO-A2.0 Catalogue Server
• USNO-B1.0 Catalogue Query Form | CfA Mirror
• Vizier
• VSNET - International mailing list on Variable Stars | vsnet-alert archives | vsnet-alert archive since August 2021
• Voyager Space Probes Project home page
• WISE Catalog and Image data
• ZTF Archive Query Form | ZTF DR16 | ZTF DR17 | ZTF DR18 | ZTF DR19 | ZTF DR20