Apps (Android)
- Mobile Observatory Astronomie / Mobile Observatory 2 – Astronomie
- Stellarium Mobile / Stellarium Plus
- Clear Outside
- Aurora Alerts – Northern Light (Check out others)
- RegenVorschau (radar for rain showers and arrow indicators!)
Sky Events
- Calculate ISS Transitions with Moon/Sun
- Asteroids near Earth, Sunspots, Aurora and much more at SpaceWeather
- Night Sky by timeanddate
- Tonight by Earthsky
Objects
- Current bright Comets
Sites & Weather
- Clear Sky tonight?
- Tonight’s Sky (very old fashioned page)
- Light pollution Map
- Dark Site Finder
Astro Photography Support
- Analyse Photos, solve the plate with Astrometry