Cosmic & Heliospheric Learning Center -- Based at NASA/GSFC. Includes sections about the Sun, the cosmic rays & the history of its study. Visit

NASA/Marshall Solar Physics -- The Solar Physics Branch of Marshall Space Flight Center's (MSFC) Space Sciences Laboratory (SSL) is made up of 15 scientists involved in various studies of the physics of the Sun. Visit

How Stuff Works: Sun -- In-depth illustrated description of the Sun, its surface, atmosphere, sunspots, solar prominences & solar flares. Visit

Analemma -- Explains the phenomenon - the Sun's apparent path in the sky - including simple animations. Visit

The Inconstant Sun -- From NASA Science News, experiment on board shuttle mission STS-107 is monitoring the Sun's variable brightness & its link to terrestrial climate change. Visit

Sun Position Calculator -- Calculates Sun azimuth & altitude for a given location & date. Visit

Stanford Solar Center -- Presents a collection of educational activities based on Solar Oscillations Investigation (SOI) & Solar & Heliospheric Observatory (SOHO) data. Visit

YPOP Tour of the Sun -- Educational information about the Sun. Visit

Views of the Solar System: Sun -- Pictures, animations, general information & data. Visit

The Virtual Sun -- Virtual tour of the sun which uses images, diagrams, and movies to illustrate subjects such as solar wind, solar flares, the solar surface & sunspots. Visit

Global Oscillation Network Group -- Features project over view & news of a group attempting to measure the oscillations of the Sun's interior. Visit

Helio- & Asteroseismology -- Offers introduction to the science of solar oscillations. Visit

Global Oscillation Network Group (GONG) -- Extensive information about the group & the project, which aims to conduct a detailed study of solar internal structure & dynamics using helioseismology. Visit

The Nine Planets: Sun -- General information, some statistical data & links. Visit

Birmingham Solar Oscillations Network -- Who they're & what they do. Also includes background information, results, data. Visit

The Sun is a Ball of Iron -- Dr. Oliver K. Manuel's posits a new theory of the sun's formation, composition & energy production. Visit

Current Solar Data -- An unofficial archive of NOAA GOES solar data. Visit

Solar Images from SDAC -- Daily pictures from the SOHO & Yohkoh space platforms, the US National Solar Observatory, & the Mauna Loa Solar Observatory. Visit