Earlier quoted context omitted.
> BUT, slingshots don't work forever. Once the projectile is out of the slingshot, it's downward trajectory has already begun. You should read the article before you comment: "I don’t mean slingshots in the Dennis the Menace sense. Slingshots in the astrophysical sense." An object that uses an astrophysical slingshot maneuver will continue on its trajectory at the same speed and vector forever (Newton's first law).
I read the comment, maybe just not as carefully as you would have liked. Thanks for the clarification.
I would not have called you out except that you used the article to put in a barely related plug for your company.