Comment by 0x0203
3 days ago
If the universe does have a positive curvature as this predicts, would that mean that if we look out into space, we could see the same galaxies multiple times? Or even our own galaxy in the past? Or is the predicted curvature slight enough that anything we might see multiple times is already beyond the limits of visibility due to universe expansion?
Only if the circumference of the universe is small enough for light to have made the round trip since the universe began. But we think that the universe is much larger than that.
https://en.wikipedia.org/wiki/Particle_horizon