Hmm, by the second wikipedia link there is no basis for the 80 billion galaxies since only a relatively small fraction of the observable universe (4.2%?) is reachable if limited by the speed of light, and if not the whole universe is probably at least 10^23 times larger (by volume or by radius?).
Hmm, by the second wikipedia link there is no basis for the 80 billion galaxies since only a relatively small fraction of the observable universe (4.2%?) is reachable if limited by the speed of light, and if not the whole universe is probably at least 10^23 times larger (by volume or by radius?).