So what happens after the Vogons have finished sucking the mass through their wormhole and close it off? Does the earth end up orbiting a patch of empty space that still exerts gravity, or was that section actually an argument that they can’t open/close a wormhole and suck the sun through it?
It will not be just empty space, it will be a black hole as massive as the Sun was. Rather counter-intuitive, I know. But note that black hole is “a patch of empty space that [...] exerts gravity”.
So what happens after the Vogons have finished sucking the mass through their wormhole and close it off? Does the earth end up orbiting a patch of empty space that still exerts gravity, or was that section actually an argument that they can’t open/close a wormhole and suck the sun through it?
It will not be just empty space, it will be a black hole as massive as the Sun was. Rather counter-intuitive, I know. But note that black hole is “a patch of empty space that [...] exerts gravity”.