I want to see that the three star (wich makes the belt thingy in the pictures) from the Orion constellation are actually fit to position of the great pyramids of Giza. In they current state the matching isn't convincing, so i setted back the timer of Stellarium to 2500 BC. But it worth nothing if Stellarium dosent calculate separate star movement through time.
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Stellarium will be calculate proper movements for stars for future and past dates but using simple linear model for this task. In any case those stars from Orion constellation have small value for proper motion.
So Stellarium calculate the motion but its negligible. Well the program is cool anyway, thx!