They wouldn't land on the planet, just pass by and return. The mission announced today would last more than 16 months. Team member Taber MacCallum compares it to the Lewis and Clark expedition that explored the western US two centuries ago.
The nonprofit "Inspiration Mars" will get initial money from multimillionaire Dennis Tito, the first space tourist. Outsiders put the price tag at more than USD 1 billion.
The US space agency, NASA, isn't involved in the project. The mission would entail minimal clothing, food and water. MacCallum said the couple would use a private rocket and capsule.