Not necessarily. It would depend what distance it was acting over. The farther the better.
I'm not sure about that. Earth has momentum in the direction of it's orbit that the Sun doesn't have. On the other hand, it's easier to deflect a small object than a larger one. So the resulting interaction of forces might be more complex than it might appear at first.
I'm done trying to sound smart. "Clear" is the new smart.Planetary+ scale gravity is always more complex then it seems at first.
Blind Final Fantasy 6 Let's PlayWith nuclear reactors we could, in theory at least, have sustainable colony-ships right now. It'd just require a total mobilization of industry for exactly that reason, and they'd not be able to get anywhere very fast at all. Maybe we could luck out and have mars or Venus survive in a way they end up in a more human-friendly orbit, otherwise humanity'd be screwed in the long run.
I'm baaaaaaack
"Jupiter".
I don't know how many of you that may interest, but some NASA engineers held an AMA (Ask Me Anything, or "us" in this case) on Reddit.
Said engineers work on Ion Propulsion.
If you're interested only by the answers, look out for the white-on-blue "NASAGlen" name tag. They went over quite a bit of stuff already, and according to the original post the engineers did, they might be taking more questions.
Just throwing that out there.
edited 13th Jan '14 12:32:55 PM by QuestionMarc

Anything that would knock the Sun out of orbit around the Galactic center would also knock the planets loose from the Sun.
I'm done trying to sound smart. "Clear" is the new smart.