Due to human experience with physical 3D objects, it's hard to wrap your head around something that is finite but has no edge and no outside, assuming the Universe is finite. It's not quite so hard if you assume it is infinite. So perhaps an infinite rubber sheet analogy would be better than...
I saw on another forum mention of Alcyoneus radio galaxy and have been google searching but can't find any information on it from any reputable astronomy related websites.
Is it real or just fake news?