General astronomy
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Deep-Sky Atlas
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The Sky LIVE
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ORIONmedien GmbH
NASA websites and Hubble space telescope (HST) links
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NASA Jet Propulsion Laboratory
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Space Telescope Electronic Information Service
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Hubble Space Telescope
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HST Pictures
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James Webb Space Telescope 
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Other Cool NASA Web Sites
Observatories
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Observatoire de Genève
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Home Page de l'Observatoire de Besançon
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Home Page de l'Observatoire de Paris
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European Southern Observatory
Astronomical societies and clubs
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Sociétés astronomique de Suisse (SAG-SAS)
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Union romande des sociétés d'astronomie (URSA)
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Société d'astronomie de St-Imier
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Société Astronomique du Valais Romand (SAVAR)
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La société neuchâteloise d'astronomie (SNA)
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Groupement des astronomes amateurs courriérois (GAAC)
Friends working in field of astronomy and astronautics
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Home page Claude Nicollier
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Home page Raoul Behrend
The phenomena of nature
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Atmospheric Optics
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Rainbow Calculation
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Observatoire français des tornades et orages violents
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Impacts de foudre (Meteociel.fr)
Solar observation
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SpaceWeather.com
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SpaceWeatherLive.com – Real-time solar activity
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The SOlar and Heliospheric Observatory (SOHO)
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ULYSSES/ESA Home Page
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Solar Dynamics Observatory (SDO)
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Atmospheric Imaging Assembly (AIA) for the SDO
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National Solar Observatory
Planets and satellites exploration
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Lunar Atlas from the Apollo Missions
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Mars Missions
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Mars Global Surveyor
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Malin Space Science Systems (Mars Global Surveyor)
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Venus Overview
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Magellan Mission to Venus (JPL)
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Système solaire interactif 3D
Astrophotography
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The Photopic Sky Survey
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Astronomical Images ‐ Deep Sky Astrophotography
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Starmatt Astrophotography
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Astrophotography by Alan Friedman
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Astronomical Cameras: A Guide to Astrophotography
Image sensors and equipment setup for astronomy
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Astronomy Threads Explained
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Celestron f/6.3 reducer/corrector with DSLR on C9.25
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Baader Herschel Wedge ‐ How to check it?
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Astronomik Narrowband Filters Hα, Hβ, OIII and SII
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UV filters for Venus photography ‐ Spectrum
Weather forecast (of great importance in astronomy !)
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Weather Forecast for Switzerland
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Meteoblue ‐ Astronomy Seeing
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Radar system from the ETHZ
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Landi Meteo
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PrevisionMeteo.ch
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Weather Center for Europe (german service)