NASA, Observatorium, http://observe.ivv.nasa.gov

Mt. Palomar Observatory, http://astro.caltech.edu/observatories/palomar

"Eyes on the sky, feet on the ground."  A set of pages of the web site, "using science and the internet as everyday classroom tools,"  from the Astrophysical Observatory, http://hea-www.harvard.edu

"Journey through the galaxy," (1998 December) http://library.advanced.org/12713/noframes/index.sthml

Lake Afton Public Observatory,   http:// www.twsu.edu/obswww/lss.html

Space Sciences Lab, http://science.msfc.nasa.gov,  Space Science news, Nasa's Marshall Space Flight Center.

The Science "Information Infrastructure,"  Project of the University of California @ Berkely:           http://www.cea.berkely.edu