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icausedisappointment2 karma

I have read that if our Sun was replaced by a Black Hole of equal mass, none of the orbits of the planets in our solar system would be affected. My question is this: does a Black Hole not "suck in" objects unless they cross the point of no return? Second question: How can a Black Hole affect an object's gravity without sucking it in? (like the Black Hole in the center of our galaxy).