Solar lead acid charger, with battery voltage monitor, for 12V battery.
http://www.xs4all.nl/~odu/solar.html
Lead acid charger, with battery voltage monitor, power comes from solar panels
http://www.solorb.com/gfc/elect/solarcirc/ccntlvd/
has 0-10A full scale
http://www.solorb.com/gfc/elect/solarcirc/imeter/index.html
http://www.web-ee.com/Schematics/Solar%20Power%20Supply/Solar_Supply.htm
A daily, updated report on solar activity. Useful for DX operators.
http://www.dxlc.com/solar/
A collection of educational activities and resources based on Solar Oscillations Investigation (SOI) and Solar and Heliospheric Observatory (SOHO) data.
http://solar-center.stanford.edu/
Features a guide to the solar system for visitors of all ages with a scale model, interactive quiz, text, and images.
http://www.solarsystem.org.uk/
JavaScript calculator of sizes and distances of solar system bodies for making a scale model.
http://www.exploratorium.edu/ronh/solar_system/