Apologies in advance if this is a stupid question. I'm told the Hubble Deep Field shows galaxies as distant as 13 billion light years away. 13 billion years isn't far off the apparent age of the universe - 13.75 billion years, says Wikipedia, from estimates based on the Hubble constant. I'm wondering (and here's the intellectual nose-dive) whether that's long enough ago that those old galaxies should appear "bunched up" - visually closer to each other because we're seeing them at a point in history when the universe had expanded significantly less than it has by now? Or... was most of the expansion in the first billion years (in which case I'll stagger around for a couple of weeks worrying about how it managed to expand at 13 times the speed of light). If anyone can shed any light on my confusion, I'd be really grateful. Thanks in advance!