Atlas of Nearby Stars - Experiments in Virtual Astronomy: Introduction, background, methodology, using the applet, results, discussion, conclusion, and references.
Now Anyone Can Make a Discovery: Science Tuesday, an article.
SkyView: Virtual observatory on the net generating images of any part of the sky at wavelengths in all regimes from radio to gamma-ray.
The Virtual Amateur Astronomer: Information and internet images of the Universe.
Today From Space - The Cosmos: Picture of the day, Hubble pictures, and Chandra x-ray astronomy.