I must be missing something... It’s been known for a long time that the galaxy had “arms” that radiated out like a spinning wheel. obviously those arms are “denser” with stars than in areas where the arms aren’t. so is that what they are calling “corrugated”? that isn’t news to me and im no astrophysisist. that’s why i’m asking what i’m missing. Now if they are saying the arms are longer than previously estimated and therefore, there is an extra “corrugation” beyond us in that particular direction on the diagram, in effect extending the galaxy out farther than previously thought then yeah, cool, I can see that. is that all this is?
What it means is that the galaxy is larger because the density of matter in the arms causes the fabric of space-time to be warped in such a way as to cause the linear distance to be misleading to the eye. Like a Chinese fan, the galaxy is not truly flat, but has folds that make it bigger than it seems....................If I understand it correctly.............