Solar position

The Earth-Sun Relationship

Open /scripts/educational/earth-sun-relationship

This applet demonstrates the geometric relationship between the Earth and the Sun, showing the resulting illumination pattern at any time of the day and year for any location. All factors such as declination and the equation of time are fully considered and accurately modelled. It allows you to overlay information such as annual sun paths, important latitude/longitude lines and world time zones. You can rotate around the Earth in any direction or lock into a geo-stationary or view-from-sun perspective. Both annual and daily solar cycles can also be animated to better appreciate subtle effects.