Originally Posted by mugaliens

What if everything we see is actually inside a black hole so massive that the distance between it's singularity/surface and it's event horizon is much larger than the observable universe?

Let's say it's mass was a trillion trillion times the mass of the observable universe, and the distance was a trillion times greater than the diameter of the observable universe.

Would we be able to detect being inside?

To account for the age of the universe, it's a rotating BH and we're in an orbit around it's centroid.