Relative Black Holes: Can Particles See Universes of Them?

[JPBenowitz]

Is it possible that a particle traveling so close to c from its reference frame observes objects within their schwarzschild radius? In other words is it possible that in these particles reference frames is a universe primarily comprised of black holes? If so then would gravity be relative?

 

[Dale]

No (wrt relative black holes).
http://math.ucr.edu/home/baez/physics/Relativity/BlackHoles/black_fast.html

Wrt, "would gravity be relative", I guess you would have to define what you mean by that.