United States Naval Observatory Astronomical Aplications - dynamic astronomical data depository
Clear Sky Charts - weather forecast for astronomy
SkippySky Astronomy Weather Forecast - weather forecast for astronomy
Accuweather for Astronomy - weather forecast for astronomy
NASA Interactive Global Geostationary Weather Satellite Images - satellite images
Dark Sky Finder - find those precious places for deep sky exploration
Cloudy Nights Telescope Review and Forum - the most trusted source for astronomical equipment reviews and the worldwide discussion forum
Astronomy Picture of the Day - the best shots of the night sky
Northwest Suburban Astronomers - astronomy club based in Chicagoland
Polacy Astromaniacy - an informal club for Polish-American community in Chicagoland
Cartes du Ciel - a free program to draw sky charts
Sky Map - Image viewer for stars and deep space objects
Stellarium - A realistic display of the night sky
Orbiter - Space Flight Simulator