Here are a couple of pages within the Virtual Learning Commons that will link you to great sites on the sun and solar energy:
The Grade 9 Science Guide: http://vlc.ucdsb.ca/9science/earhandspace
The other place to look is in the A-Z Databases: http://vlc.ucdsb.ca/az.php. On this page, check out some of the electronic databases listed there.
Use search terms like "sun", "solar", and "solar energy" to help you narrow down your search.
Feel free to contact me if you need more assistance.