The observable Universe is vast ... Black Hole Universe: A fascinating hypothesis posits that our entire Universe could be contained within a black hole, challenging traditional Big Bang models.

"The observable universe is only that part of ... That's much smaller than even our smallest estimates of the entire universe. "We see at most 3% of the universe," Pamela Gay, a senior scientist ...

The observable universe is a ball-shaped region of the universe comprising all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time, because ...