> a few days after the presently observed light was emitted) and we would never know it until it's just about too late. Right, good point! I shouldn't have ski

> a few days after the presently observed light was emitted) and we would never know it until it's just about too late. Right, good point! I shouldn't have skipped my morning coffee. > if it was hit by something big For the record, I assume you mean not a literal "hit" but some sort of binary interaction with another very massive object that ends up transferring (a lot of) momentum to the black hole.