: Most cosmologists believe that if you traveled past this "horizon," you would just find more galaxies and stars stretching on forever.
The observable universe is a sphere around Earth containing everything we can currently see. Because light has a speed limit, we can only see objects whose light has had time to reach us since the Big Bang (about 13.8 billion years ago).
: Our universe could be an isolated "island" floating in a higher-dimensional "super-universe". What's Beyond The Observable Universe? 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
: 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 : Most cosmologists believe that if you traveled
Some modern theories suggest our entire universe is just one "bubble" in a much larger sea.
: This theory proposes that infinite other universes exist, perhaps with different laws of physics. : Our universe could be an isolated "island"
: 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