Astronomy Picture of the Day,  Very fine pictures daily and good information

European Southern Observatory, Very Large Telescope (VLT) Images

Center for Backyard Astrophysics,  Columbia University

Hubble Space Telescope Heritage Images, from the HST, your 5 Billion dollar telescope 

 International Space Station and Satellite Predictions, for the location of the SDAA Tierra Del Sol Observing Site 

Introduction to Astronomy 101, University of California San Diego Physics Department

NASA/IPAC Extragalactic Database (Level 5), All about galaxies and cosmology

Orange County Astronomers, Our favorite northern astronomers

Sky and Telescope Magazine, S&T's Home Page

Solar System Dynamics by JPL, Everything about orbital parameters

Spaceflight Now!, Tracks launch and space activities

The AstroPages, San Diego Mirror Grinding and Telescope Makers 

The Solar and Heliospheric Observatory,  (SOHO) See the sun hot and up close