What would be more frightening jupiter hitting saturn or a black hole coming out of nowhere?

Saturn is as far away from Jupiter as Jupiter is as far away from the sun. If the two gas giant planets could somehow come together, our solar system would have a binary star system, since the new planet would probably have enough m to start fusion and would become a star. It might create a shock wave when fusion began and this radiation might earth's magnetic field, so this would probably eliminate all life on earth. Black holes don't just appear out of nowhere and most of them are most likley at the center of the galaxy, where it is believed a mive black hole resides. If one did p close to the solar system, it might disrupt the orbits of the planets. Before it did this, it would began drawing material from the oort cloud onto its surface. Any material falling onto a black hole creates intense bursts of radiation as it is compressed. This might create gamma rays and this would surely eliminate a substancial amount of life, not only on earth but possible anything living in this sector of the galaxy as well. I suppose it is a good thing that the universe consists almost entirely of empty space.