Add links to online astronomy resources here.

Articles
Blackbody Radiation - http://hea-www.harvard.edu/~efortin/thesis/html/Black_body.shtml
Did Life Begin in Ice? (Discover, February 2009) http://discovermagazine.com/2008/feb/did-life-evolve-in-ice
Hunting for a Second Earth (Discover, November 2008) - http://discover.coverleaf.com/discovermagazine/200811/?pg=37
NASA's Kepler Mission to Hunt for Other Earths (Science Daily, February 2009) - http://www.sciencedaily.com/releases/2009/02/090219201411.htm
Largest Supernova (SN 2006gy) - http://science.nasa.gov/headlines/y2007/07may_bigsupernova.htm
Mission to Forgotten Planets (Discover, February 2008) - http://discovermagazine.com/2008/feb/11-mission-to-the-forgotten-planets
Space (General Discover Articles) - http://discovermagazine.com/topics/space
Violent Birth (Discover, February 2009) - http://discover.coverleaf.com/discovermagazine/200902/?pg=42

Imagery Data Bases
Astronomy Picture of the Day - http://antwrp.gsfc.nasa.gov/apod/astropix.html
Astro PD Archive - http://apod.nasa.gov/apod/archivepix.html
NASA's HEASARCH Data Archive - http://heasarc.gsfc.nasa.gov/docs/archive.html
Sloan Sky Survey - http://cas.sdss.org/dr7/en/
Solar and Heliospheric Observatory (SOHO) - http://sohowww.nascom.nasa.gov/

Astronomical Organizations
International Astronomy Union - http://www.iau.org/

Software
Google Sky - http://earth.google.com/sky/index.html
World-Wide Telescope - http://www.worldwidetelescope.org/Home.aspx

Tutorials and Videos of Astronomical Concepts
Univ. of Chicago Dept. of Astronomy - http://astro.uchicago.edu/cosmus/projects/

Other Web Sites
International Year of Astronomy - http://www.astronomy2009.org/
Galaxy Zoo - http://zoo1.galaxyzoo.org/
Planetary Fact Sheet - http://nssdc.gsfc.nasa.gov/planetary/factsheet/
Solar System Probes - http://en.wikipedia.org/wiki/List_of_Solar_System_probes