The ever-useful "Windows to the Universe" site: mythical connections to the Sun, with three content levels (beginner, intermediate and advanced) for every link.
Information about the Egyptian sun god, Ra.
"The Sun: Man's Friend & Foe"]
"The Sun Spot" is part of "ThinkQuest". The first site is for teachers and older students. The second site is for students in grades 4-6.
NASA's Observatorium: What the Ancients Thought About the Sun