Hi, I had a few questions about the super massive black hole. 1. Are Super Massive Black Hole the nucleus of an active galaxy or in the nuclues?(if in the nuclues, then what else is there? try to be a little explanatory) 2. I used to know this, what causes extragalactic jet? 3. I know black holes are created by fusion but I also forgot how fusion works, can someone explain it to me?(I looked up in encyclopedia but didn't work). 4. How does a black hole die?(I know how it dies; when no more objects are in its gravitic reach but how is that possible?) 5. There is a sort of stars that change colors really rapidly, the only theory they can come up w/ is that it is a black hole, but how can we see a black hole then? Thx.