As far as we know, the edge of the observable universe isn’t the edge of the actual universe. It’s just the farthest that we’re able to see, because there hasn’t been time for light to reach us from any farther parts of space. There’s no reason to think space itself ends at that particular point, but we don’t know how much farther it goes. It might just continue forever. The edge of the observable universe isn’t the edge of space, but it’s the edge of the map.
