Weather
- Environment Canada Forecast
- Weather Underground Forecast
- Weather Network Forecast
- Satellite images
- Cloud cover forecast
- College of DuPage – Satellite Images
- Winnipeg Clear Sky Chart
- NCARÂ Weather Forecast Models
Observing
- Heavens Above
- Space Weather
- US Naval Observatory Astronomical Applications (Rise and Set Times, Twilight Definitions, Moon Phases and more)
Information
- Interactive NGC Catalog Online
- SIMBAD Astronomical Database online
- NASA Astrophysics Data System – Abstract Service
- Annual Reviews
- International Astronomical Union (IAU) Central Bureau for Astronomical Telegrams: List of Supernovae
- Minor Planet Center
- American Association of Variable Star Observers (AAVSO)