Neptune - From the Solar Voyager guide. Descriptions and facts about the planet Neptune.

The Discovery of Neptune - Interesting history on why it wasn't discovered sooner by the British.

Planet Neptune - From Dilip's Planet Corner.

Neptune: Royal Greenwich Observatory - Good, up to date, introduction.

Orrery: Neptune - Concise introduction to the planet, with numerous resources.

Neptune - From "Views of the Solar System".

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

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

Neptune - Simple explanation from "History of the Universe".

The Planet Neptune - good detail on this planet.

Neptune - NASA's Windows to the Universe.

Neptune - From The Nine Planets multimedia tour of the solar system.