<URL:http://www.ciesin.org>
  Consortium for International Earth Science Information Network (CIESIN).
Data about human interactions in global environmental change from many 
sources.

<URL:http://www.sel.noaa.gov>
<URL:gopher://gopher.sel.noaa.gov>
  NOAA's Space Environment Laboratory (SEL) server has information about the Sun and the environment between the Sun and the Earth, including "space weather" and solar images

<URL:ftp://explorer.arc.nasa.gov/pub/SPACE/>
  Viking, Magellan, and Voyager data, and various earth-from-space images and information. 

<URL:http://ageninfo.tamu.edu/eclipse>
<URL:gopher://ageninfo.tamu.edu/11/eclipse>
  MPEG of GOES-7 and GOES-8 images during May 10 1994 eclipse