The Stellarium location window. This shows a map of the world, together with a dialog box displaying the latitude and longitude of the selected location. The location on which the Stellarium display is based can be chosen by clicking on the map or selected from a drop-down list of predefined locations. The screen shows the location being set to Teide observatory (Tenerife), with a latitude of 28 degrees 17 minutes North and a longitude of 16 degrees 30 minutes West, and an altitude of 2390 metres.