Yaffle
Volunteer Moderator
Do not know if this has been mentioned, but why 400 billion systems, that means 800+ billion stars, since most systems is binary. That is 2 times the high end star estimate that astronomers give. So if they make the galaxy the correct dimensions, the systems will be too close to each other, compared to real-life.
Or did I get anything wrong?
There is general confusion about the number, and what there are 400 billion of exactly. I think David ended up saying something along the lines of "a metric truckload". It's a huge number, well beyond what could ever be seen in a human lifetime.