American Astronomical Society http://www.aas.org

Astroweb:Astronomical Internet Resources contains pointers to potentially relevant resources available via Internet and is a product of the AstroWeb Consortium. http://www.st sci.edu/science/net-resources.html

Space Telescope Science Institute: Home of Hubble Space Telescope http://www.stsci.edu/

Hubble pictures: http://oposite.stsci.edu/pubinfo/pictures.html

Astronomical Society of the Pacific http://www.aspsky.org/

A great list of astronomy links: http://www.aspsky.org/links/sites.html

Students for the Exploration and Development of Space (SEDS) http://www.seds.org

Astronomy Magazine http://www.astronomy.com

Sky and Telescope Magazine: http://skyandtelescop.com

New Scientist: http://www.newscientist.com

San Francisco Amateur Astronomers http://members.aol.com/chelleb/sfaa.htm

NASA http://www.nasa.gov

Ask the Astronomer

http://itss.raytheon.com/cafe/qadir/qanda.html

The Particle Adventure http://www.ParticleAdventure.org

http://www.cern.ch/Public/SCIENCE/TutorialWelcome.html

http://www.treasure-troves.com/astro/

http://www.fourmilab.to/solar/