Have you ever been to planetarium? You like to look into the sky at night?
You may found this creation very interesting. A huge sphere in the sky which shows different parts of Universe.
Stellarium is just a huge holodeck :)
But did you know, that stellarium was used in the past for the rooms where people who do astronomy / makes the sky charts do their jobs?
Try it yourself here: http://maps.secondlife.com/secondli.....anto/62/99/828