The Inspiration Mars team have said that the ideal crew for the mission will be, "two professional crew members - one man, one woman - flying as private US citizens."
Jane Poynter added that the crew members they sought should be a 'proven couple,' to help cope with the long trip.
The website for the mission added that, "method of crew selection and specific criteria to be announced at a later date."
More top news
Isolated afternoon showers are likely over Scotland.
"I definitely get less money than a male in my situation would," she said. "Definitely."
Muscular Dystrophy UK said the lack of an option to label abusive tweets based on disability was preventing more reporting.