Obrir la finestra Opcions de la vista establiu- hi les "Coordenades horitzontals", amb l' opció de mostrar la "Terra opac". Obrir la finestra Estableix temps (Ctrl; S) i canvieu la data a algun moment a mitjans de l' estiu i l' hora a les dotze del migdia. Tornar a la finestra principal, apunteu cap a l' horitzó sud (premeu S). Observeu l' alçada del Sol sobre l' horitzó al migdia durant l' estiu. Ara, canvieu la data a algun moment a mitjans de l' hivern (però mantingueu l' hora a les dotze del migdia). El sol ara restarà molt més baix en el cel.
Make sure your location is set to somewhere that is not very near the equator for these experiments. Open the Configure & kstars; window, and switch to Horizontal coordinates, with the Opaque Ground shown. Open the Set Time window (Ctrl; S), and change the Date to sometime in the middle of Summer, and the Time to 12:00 Noon. Back in the Main Window, point toward the Southern Horizon (press S). Note the height of the Sun above the Horizon at Noon in the Summer. Now, change the Date to something in the middle of Winter (but keep the Time at 12:00 Noon). The Sun is now much lower in the Sky. You will also notice that the day durations are different if you open the What's Up Tonight? tool for each date.