2018 Mars mission: Who should go?

Billionaire Dennis Tito announced plans Wednesday for a two-person private mission to Mars, in 2018. The project seeks a married couple with technical backgrounds and a healthy dose of courage. 

A new, privately funded campaign is on to launch a manned mission to fly by Mars in 2018. Of the numerous open questions about the voyage, one of the most pressing is, who should go?

Space tourist Dennis Tito announced the plans Wednesday (Feb. 27) during a press conference in Washington, D.C., at which he described a new nonprofit organization he founded, the Inspiration Mars Foundation, to plan the mission.

Tito envisions sending two crewmembers on a roughly 500-day trip to Mars and back. To combat the isolation and loneliness that could set in, the Inspiration Mars team hopes to recruit a married male-female couple to make the private Mars mission in 2018 together.

"It's important that this is a man and a woman because they represent humanity," said Jane Poynter, president and chairwoman of Paragon Space Development Corporation, and a member of the Inspiration Mars team. "After all, we are more or less 50 percent men and 50 percent women [on Earth]. It represents our children — whether they are a girl or a boy, they see themselves reflected in that crew." [Dennis Tito's 2018 Human Mars Flyby Mission Explained (Infographic)]

Married couples

Poynter and her husband, Taber MacCallum, who is chief technology officer for Inspiration Mars, spent two years living inside the Biosphere 2 experiment, and learned the benefits of having a close companion to lean on.

"It was extremely helpful to have somebody that I could problem solve with," Poynter said. "It was also fantastic to have the opportunity to be there and share the experience when we had those wondrous moments."

Inspiration Mars plans to recruit highly qualified crewmembers with the technical background necessary to serve as space mechanics on all aspects of their vehicle, should it need repairs.

For their part, Poynter and MacCallum aren't just mission planners — they also plan to throw their hats in the ring as crew applicants.

Spartan conditions

The trip, which would capitalize on a rare planetary alignment that allows for a boomerang mission around the Red Planet much more quickly than normal trajectories, would largely use existing hardware, spacecraft and rockets, but with some modifications to support a crew for such an extended period.

Thus, whoever signs up for the trip will be in for some Spartan conditions.

"This going to be a very austere mission," MacCallum said, comparing the Mars voyagers to Lewis and Clark, blazing a trail through the unknown.

"It scares me a little bit," Poynter told SPACE.com. "I'd be lying if I said it didn't. But the opportunity to look back at the Earth from Mars — that's an experience not to miss."

The right stuff

Whoever undertakes the mission will need "the right stuff times 50," Tito said.

The successful applicants must be resilient, even-keel, and able to maintain a happy attitude in the face of adversity, Poynter said.

Despite the challenges, though, Inspiration Mars is expecting a flood of applications from people eager for the chance to make history by traveling farther into space than ever before.

The team's medical expert, Jonathan Clark of the Center for Space Medicine at Baylor College of Medicine, said the crewmembers must also be prepared to face some health challenges. In addition to the havoc that a year and a half of microgravity will wreak on the human body, the Mars travelers will face a strong dose of radiation, which could elevate their risk for cancer by about three percent.

"The crew would know about it, they would have to decide, 'I realize that I'm going to have an excess cancer risk," Clark said. "Ultimately it's going to have to be those personal decisions."

Follow Clara Moskowitz on Twitter @ClaraMoskowitz or SPACE.com @Spacedotcom. We're also onFacebook & Google+.

• Inspiration Mars: Private Mars Voyage in 2018 (Gallery)
• Married to Mars: 9 Questions for Dennis Tito on Private Martian Trips
• The Boldest Mars Missions in History

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