[from website] It shows you the solar system viewed from top (90 heliocentric). The objects have the following colors: Sun - yellow Mercury - green Venus - white Earth - cyan Mars - red Jupiter - gray Saturn - green Uranus - pink Neptune - cyan Pluto is not included since it's way "off course" A left click on the window changes the view between inner and outer planets. A left click on the date increases the day/month/year. A right click on the date does the opposite. Click the right mouse button on the solar system to reset the date to the current date (which is in Universal Time).