So i just had a thought. A rotating object creates a small but identifiable vortex in space-time. I would imagine that the faster the object rotates, the more drastic the vortex becomes. My question is, if you were to have a massive object rotate very fast, at near the speed of light, how does that effect the region of space-time around it? My hypothesis is that if it spins fast enough, the vortex becomes parallel to its own rotation axis, which i guess would mean that time and space becomes infinitely slow as you approach the center of the rotating body? A real world example i guess would be a pulsar, which rotates pretty fast, would mean that if Alice were to approach such a star, Alice would experience less time then Bob, who is at a similar star that doesn't rotate. If this is true, then does this mean that a rotating object could essentially function like a black hole? If a small object were to be rotated fast enough, so much so that it's space-time vortex becomes parallel to its rotational axis, that light would never be able to leave the rotating body? (which i guess would make it invisible lol) I'm curious to know what you guys think, and if I've made any wrong assumptions.