In Isaac Asimov’s "Nightfall", the people of another world are driven mad because they see how many stars are in the sky when all six suns are hidden. This happens every two thousand years, and civilization falls apart.
Two of the scientists construct a makeshift planetarium that is covered in black velvet and shows a couple dozen holes in the roof to simulate the stars. They thought they might find a way to immunize themselves to the effect, if in fact seeing these “stars” is what drives you mad.
The psychologist of the group figures out why the experiment fails, and begins to explain it a couple of times, but is interrupted. Did the author ever explain why the experiment fails? The psychologist couldn’t possibly know there were tens of thousands of bright stars visible, and that is what causes the madness.