So, according to stuff i have read over the past few days (quite interesting stuff out there) there is a "supermassive blackhole" at the center of our universe. what i would actually like to know is if this had the supposed mass it does which if i am correct with my memory was something along the lines of 1.8x10^10 solar masses. now if this was that powerful and heavy why wouldn't everything around it become so unstable that they would also start smaller black holes, which in turn would cause the destruction of our galaxy? I Mean if it is there, and is that heavy wouldn't have at least some effect around it (which would cause it to grow and consume more) It seems like a pretty large black hole for weighing that many solar masses. which according to wiki is between .0001 - 10 AU but still, you would think that something so dense, and so powerful would do something at least, sooner or later?