KStars is a graphical desktop planetarium for KDE. It depicts an accurate simulation of the night sky, including stars, constellations, star clusters, nebulae, galaxies, all planets, the Sun, the Moon, comets and asteroids. You can see the sky as it appears from any location on Earth, on any date. The display can be panned and zoomed with the mouse, and you can easily identify objects, and track their motion across the sky.
You will see the configuration wizard. On the first screen it will ask you for a home location. Next is question about downloading extra data. Click on "Download Extra Data" will open new window with list of available extra data sets, to let you select what would you like to install.
After closing that window initial setup is finished and you can close the wizard. This is what you will see first:
If you downloaded thumbnails than zoom (scroll wheel) will give you this: