One of the biggest ironies in a planetarium is the question concerning the "ideal" place to sit. In order to view the star constellations as realistical as possible, the sight from the centre is the least distorted. Of all places it is taken by the star projector. The closer the seating to the center, the better the image. On the other side, the angle of view becomes somewhat smaller, for the projector constricts the sight. Moreover, one or two directions appear harder to achieve, because the head will have to be turned inconveniently.

At a margin seat, one sees a larger solid angle of the hemisphere, but the direction above the head is almost completely eluded. The zenith is wrong, too. From the astronomical point of view, the South side is most interesting (for observers at Northern latitudes), since the zodiac culminates there. But the circumpolar constellations in the North including the Big Dipper are best seen from the opposite seats. The advantages of a uni-directional construction of the seat rows will be a big disadvantage with regard to the scientific reality. Tilted and turning arm chairs are a good compromise in many cases.