To provide a planetarium device, a planetarium control device and a planetarium control program enabling diversified performance in the explanation manually operating the planetarium even when an operator is not skilled in volume operation of an operation table.

The planetarium device is provided with a display 16 for displaying a cursor 20 moving in accordance with the operation of a mouse 17 together with an image projected on a dome screen by a fixed star projector 11 and a planet projector 12. Also, the planetarium device is provided with a planetarium control device 14 which generates a signal to display the images on the display 16 and which analyzes the movement of the cursor 20. The result of analysis by the planetarium control device is transmitted to a projector control device 13 which, based on the result of analysis, runs a drive motor of each moving shaft provided in each projector 11, 12.