So what we have here is a solar system sized "Norwegian Spiral" ~ and it's going where?
Here?
Seriously now, how would we be able to tell the difference between a sufficiently large artifact of advanced civilization and just something in space.
"Seriously now, how would we be able to tell the difference between a sufficiently large artifact of advanced civilization and just something in space." Just as I read that I was thinking about something I read about making an unmistakable sign in the universe to say we are here. I wish I could remeber where I read it.