The universe is, as far as observations allow us to say, at least about 93 billion light-years across in diameter for the observable universe. That does not mean the whole universe is only that size; it means light has had a finite time to reach us since the Big Bang, so there is a limit…
Exploring the depths of the cosmos reveals some of the most remote and enigmatic objects known to humankind. From ancient galaxies glimmering in the first few hundred million years after the Big Bang to titanic quasars blazing with unimaginable power, these distant beacons challenge our understanding of space, time, and the fundamental laws of physics….
