Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope. It is being used in planetarium projectors. Just set your coordinates and go.
Feature list: Basic controls * Look around by mousedragging, or moving your mouse against the edges of the window
* Time control: forward, backward, return to present
* Zoom
* Tabbed configuration windows
* Text user interface: minimalistic menu for use with dome projections
* Clickable world cities map to set coordinates
* Save your default location
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