At the Edge of the Known Universe –“Galaxies Ten Times More Faint Than Any Prior”

Hubble Ultra Deep Field


Astronomers are confident that the volume of space-time within range of our telescopes—‘the universe’—is only a tiny fraction of the aftermath of the big bang. “We’d expect far more galaxies located beyond the horizon, unobservable,” says renowned astrophysicist Martin Rees, “each of which (along with any intelligences it hosts) will evolve rather like our own.”