> Maybe they could use some gravity assists to speed up the journey out to Saturn/Neptune, and then use aerobraking to slow down again for the rest of the journ

> Maybe they could use some gravity assists to speed up the journey out to Saturn/Neptune, and then use aerobraking to slow down again for the rest of the journey??? Or an gravity assist at Neptune to slow down? Given their orbits cross it maybe it would be practical and relatively fast someday, but maybe not for a long time. https://en.wikipedia.org/wiki/Gravity_assist https://en.wikipedia.org/wiki/Gravity_assist https://www.theplanetstoday.com/the_planets.html https://www.theplanetstoday.com/the_planets.html