>>510087493PS I'ver groked it and it seems it was enough for humanity to arise within it, at 5-10 mln years. So enough for humanity to arise with low added radiation. Wonder if that had an effect on us or the climate.
I assumed it was older, but it basically expanded into us as it threw off the matter and engulfed our system...
This is potentially good for interstellar travel, I think. Less shit to smash into as you bulldoze void at 0.9 C.