: Measurements suggest the universe is "flat" like an endless sheet of paper. This implies it may be infinite in extent , with no physical edge at all. 2. Beyond the Fabric of Space-Time
: In this model, if you travel in one direction long enough, you eventually end up back where you started . There is no "outside" because the fabric of space-time itself is all that exists. Beyond the universe
When asking "what lies beyond the universe," the answer depends on how you define the "universe" itself. Scientists generally split this into three distinct concepts: what is beyond our sight, what is beyond the physical fabric of space, and what might exist as a "super" structure. 1. Beyond the Observable Universe : Measurements suggest the universe is "flat" like
: A common misconception is that the universe expands into something. In reality, space itself is stretching ; it doesn't need "empty room" to grow into. 3. The Multiverse and "Super" Universes Beyond the Fabric of Space-Time : In this
If the universe is finite, it doesn't necessarily have a "wall." Instead, it might be curved like the surface of a sphere.
Some modern theories suggest our entire universe is just one "bubble" in a much larger sea.
: Our universe could be an isolated "island" floating in a higher-dimensional "super-universe". What's Beyond The Observable Universe?