This interactive tool relates the sun's illumination angle of the earth globally, with the local sunlight angle (as measured from zenith) experienced by an observer, depending on observer's location.[br][br](GeoGebra does astronomy!)[br][br]Drag the Sunlight point to change the Sun's angle (season). [i]In reality, this angle stays within 23.5° of the equator.[/i][br][br]Drag the Person point to change the observer's latitude. The right panel shows the local sunlight conditions experienced by the observer, including a measure of how "spread out" the sunlight is on the local surface.[br][br]Drag to pan the view, mousewheel to zoom.