There is a lot of empty space out there. A good amount of consideration was given to the time, direction and magnitude of various voyager flings. https://en.m

There is a lot of empty space out there. A good amount of consideration was given to the time, direction and magnitude of various voyager flings. https://en.m.wikipedia.org/wiki/Grand_Tour_program https://en.m.wikipedia.org/wiki/Grand_Tour_program