http://www.seds.org/billa/tnp

"The Nine Planets: A Multimedia Tour of the Solar System," by Bill Arnett Excellent pictures, glossary, and other info. One of the best astronomy web sites.

http://pds.jpl.nasa.gov/planets

Welcome to the Planets. Nice pictures, fact sheets, and other info.

http://nssdc.gsfc.nasa.gov/photo_gallery/photogallery-earth.html

National Space Science Data Center A NASA site with lots of pictures, fact sheets, glossary.

http://earth.agu.org/

American Geophysical Union

http://fourmilab.ch/earthview/vplanet.html

Earth and Moon Viewer

http://www.einet.net/galaxy/Science/Geosciences.html

Geosciences

http://gcmd.gsfc.nasa.gov/

Global Change Directory

http://sdcd.gsfc.nasa.gov/ESS/

NASA/HPCC Earth and Space Sciences Project

http://maia.usno.navy.mil/

National Earth Orientation Service

http://nssdc.gsfc.nasa.gov/photogallery/PhotoGallery-SolarSystem.html/

Solar System Family Portrait

http://www-ssc.igpp.ucla.edu/ssc/tutorial/planet_magnetospheres.html

Planetary Magnetospheres

http://www.atmos.uiuc.edu/

The Daily Planet

http://ic-www.arc.nasa.gov/ic/projects/bayes-group/Atlas/Earth/

Browser for Earth Observations from Shuttle

http://seawifs.gsfc.nasa.gov/SEAWIFS/IMAGES/MOVIES.html

Earth Observation Movie Studio

http://earthview.sdsu.edu/trees/trees.html

Web TREES

http://www.fourmilab.ch/earthview/vplanet.html

Earth Viewer

http://pubweb.parc.xerox.com/map

Xerox PARC Map Viewer

http://www-ssc.igpp.ucla.edu/ssc/tutorial/magnetosphere.html

Tutorial on the Earth's Magnetosphere

http://www.geo.mtu.edu/weather/aurora/

The Aurora Page

http://www.dartmouth.edu/~volcano/

The Electronic Volcano

http://www.ksc.nasa.gov/history/history.html

NASA Archive of Space Exploration

http://www.agu.org/

American Geophysical Union

http://www.nasm.edu/ceps/

Center for Earth and Planetary Studies (A research department of the National Air and Space Museum)

http://www.hq.nasa.gov/osf/

Office of Space Science