Websites on Neptune:
Astronomy 161: Neptune
General features and some pictures.
Encarta Encyclopedia: Neptune
Information on the planet Neptune.
Exploring the Planets: Neptune
Information and photographs on the moons, atmosphere, and rings of planet Neptune
Mathematical Discovery of Neptune
Another interesting history on how planets can be discovered mathematically.
Neptune
Pictures, statistics, and detailed information on planet Neptune.
Neptune114
Its atmosphere, rings, moons, appearance, and links to related sites.
NSSDC Photo Gallery: Neptune
Select images of the planet, with brief captions.
Views of the Solar System: Neptune
Views, animations, general information and data of the planet.
Welcome to the Planets: Neptune
Planetary profile and vital statistics.
Windows to the Universe: Neptune
Overview of several aspects of the planet. Versions available for beginner, intermediate and advanced level users.