11ac1064_ions___Astronomy___Black_Holes__Question
[Date Answered] March 17, 1998 [Questioner (age, location)] Camille and Ken (Massachusetts, USA) [Answer] A black hole would certainly disrupt the asteroids and comets, but you underestimate the strength of a black hole. Such a thing would destroy the solar system, not just divert the orbits of asteroids. [Question] 
We were just wondering, if there were a black hole in our solar system, that went in and out of the solar system (we'll call it Thesus) every 26 million years, wouldn't it disrupt the cycles of the asteroids, comets and planets, causing many of those asteroids to crash on the planets? That could be why the dinosaurs became extinct, right? Do you think that is a debatable theory?
Quickie Questions - Astronomy - Black Holes