There are a lot of critical details for the American space program to work out before a manned mission to Mars can possibly occur, from perfecting the science to organizing logistics to securing finances and more. The element PBS‘s newest documentary sheds an extraordinary new light on is the human condition factor — chiefly, how to safely separate a person from everyone and everything they love for the years upon years it’ll take to complete the mission. In Space: The Longest Goodbye, directed by Ido Mizrahy and premiering on PBS tonight, May 6, at 10/9c, it’s clear that NASA has to do much more than just crunch numbers to make any Mars adventure a reality. The documentary features testimonials from former and current astronauts as well as the agency’s resident psychologist, Dr. Al Holland, who is charged with finding a solution for keeping astronauts sane and productive while...