Really? So a passing by neutron star or depleted core of a neutron star that could rip it in two and into the gas giant even if it passes by from 2 billion miles away ur sayin that jus wont happen? Cuz it could and thats how strong the gravity on those things are. Doesnt have to be something THAT extreme tho; there are a couple dozen thousand cosmic objects that can vastly change orbits with their own gravity extremely quickly.