Neptune

Astronomy 161: Neptune
General features and some pictures.
http://csep10.phys.utk.edu/astr161/lect/neptune/neptune.html

Encarta Encyclopedia: Neptune
Information on the planet Neptune.
http://encarta.msn.com/encyclopedia_761577112/Neptune_(planet).html

Exploring the Planets: Neptune
Information and photographs on the moons, atmosphere, and rings of planet Neptune
http://www.nasm.si.edu/ceps/etp/neptune/

Mathematical Discovery of Neptune
Another interesting history on how planets can be discovered mathematically.
http://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Neptune_and_Pluto.html

Neptune
Pictures, statistics, and detailed information on planet Neptune.
http://www.nineplanets.org/neptune.html

Neptune114
Its atmosphere, rings, moons, appearance, and links to related sites.
http://neptune114.tripod.com

NSSDC Photo Gallery: Neptune
Select images of the planet, with brief captions.
http://nssdc.gsfc.nasa.gov/photo_gallery/photogallery-neptune.html

Views of the Solar System: Neptune
Views, animations, general information and data of the planet.
http://www.solarviews.com/eng/neptune.htm

Welcome to the Planets: Neptune
Planetary profile and vital statistics.
http://pds.jpl.nasa.gov/planets/welcome/neptune.htm

Windows to the Universe: Neptune
Overview of several aspects of the planet. Versions available for beginner, intermediate and advanced level users.
http://www.windows.ucar.edu/tour/link=/neptune/neptune.html