: Most cosmologists believe that if you traveled past this "horizon," you would just find more galaxies and stars stretching on forever.
: 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 Beyond the universe
: This theory proposes that infinite other universes exist, perhaps with different laws of physics. : Most cosmologists believe that if you traveled
: 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