Skyglobe is a DOS-based planetarium program written by Mark A. Haney. It includes a large catalogue of stars, constellations and other objects.
Tested with DosBox 0.72 (under Mac OSX 10.4). The program runs and all functions appear to work although the display is sluggish when panning.
Making it work
On the Mac, after starting Skyglobe use Fn+Ctrl+F1 to get the list of commands displayed.