Fiction talk:Andromeda Galaxy/Segmentum Exterioris

Hi! I was planning to make a fiction located in the Andromeda Galaxy and I wanted to make some empires to appear inthe Segmentum Exterioris. Am I allowed to do so? And if that's the case, do I have to choose an existing planet or can I make my own? Dinoman972 (talk) 18:21, March 23, 2018 (UTC)