On Tuesday, hundreds of Mars enthusiasts are gathering in Washington, DC to celebrate the red planet at the annual Humans to Mars conference. Buzz Aldrin will discuss his “cycler” plan for going to Mars. Andy Weir, author of The Martian, will be on hand to sign books and talk about his vision for Mars exploration. And representing NASA by giving the plenary speech, NASA Deputy Administrator Dava Newman will update the gathering about the Journey to Mars.

Since the conference is more or less a conclave of Mars devotees, there will probably be few hard questions asked about the feasibility of NASA's plans. But those hard questions are coming, and it’s not clear that NASA has the answers. Although space has not been an issue in the presidential election, whether a Republican or Democrat is elected this fall, a transition team will review the panoply of government spending, including NASA’s human exploration programs. Among those questions that will be asked are these: What is the plan for NASA to get to Mars? And can the space agency make it there within a reasonable budget?

NASA is a ship without a course. To read more, click here.