Eli5 how big is our universe?

Question

What could be past the 93 bilon light years we know of?

In: 4

Answer 1

Anything could be past it. All we can do is learn about the tiny part of the universe that we can see, and then assume our observations are valid anywhere. This is called the *cosmological principle*: the idea that if you zoom out enough, any sufficiently large portion of the universe will basically be similar to any other.