Sorry, but 15.00 o'clock still to demand the full ...

Sorry, but 15.00 o'clock still to demand the full entry and close already 17.00 o'clock with highlights such as flight simulator already 16.00 o'clock stop the operation, I find a joke. One could at least be informed when buying tickets. Anyone who has ever been there knows exactly that 2 hours is not enough for a proper museum visit. Why do you have to change the opening hours in winter?