WHAT MIGHT EXIST OUTSIDE THE UNIVERSE

 Possibilities are endless. But here are some likely scenarios:

1. There could be much more space like the space we can observe including more galaxies, gas clouds, stars and planets. The universe could be substantially larger than we observe.
2. If you were able to travel beyond the observable universe, it is possible you would simple travel back into the universe you came from, just like light gets curved back into a black hole.
3. There could be a barrier/edge beyond which a completely different type of “space” existed with different physics.
4. There could be many universes, perhaps one for every quantum possibility in our universe.
5. A “foam” of universes could exist with each bubble in the foam representing a different universe.