- #1
Simfish
Gold Member
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So it's often said that the Andromeda galaxy is much wider than the moon, if you count all of its outer regions as well. Yet, you can clearly see much of the Andromeda's spiral structure in the small region that the visible-to-naked-eye region occupies. So what do the outer regions of it look like? And is there a diagram on a star chart showing how far it stretches?