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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.

John Couch Adams and Neptune - The History of its discovery..

Mathematical Discovery of Neptune - Another interesting history on how planets can be discovered mathematically..

Neptune - Concise introduction to this cold and distant planet, with numerous resources including animations and vital statistics..

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..

Royal Greenwich Observatory: Neptune - Basic overview..

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..