The Lake County Astronomical Society

Estimated 3-hour Planetary Kp-index plot

Stardate.org a production of the McDonald Observatory

Sangamon Astronomical Society

Educational Observatory - Astronomy Resources

Adler Planetarium & Astronomy Museum

Digital Images of the Sky

The STScI Digitized Sky Survey

Astronomy Magazine, Star Charts, Space News

Distant Sun Astrophotography by Ron Stanley

Backyard-astro.com for amateur astronomers

CCD Tour of the Universe by Jan Wisniewski

Cartes du Ciel, Sky Charts - Freeware. A great program!

Virtual Moon Atlas, Nice Program

Hubble Space Telescope Home Page

Dobsonian Plans; Sources

Night Sky Observer

SEDS Messier Database

Sky and Telescope - Home

Skymaps.com - Publication Quality Sky Maps

Solar System Simulator from NASA

Stars and Constellations

The Nine Planets