Make a Panorama
Panorama is a great feature to show space. There are Blender and other free tools to achieve this.
First of all, use the Blender BGC Script to create a cylindric panorama. It's quite easy :)
Then, there is a free Java panorama viewer. It's good to have one solution which suits every plateform once a time. It's called PTViewer. It's a Java applet. So you can see your panorama through webpage.