The expected nominal duration of the mission is 3 years. (cersat.ifremer.fr)
Spending nearly a year in space, 249 miles from Earth, could be a lonely prospect, but an office at NASA's Goddard Space Flight Center in Greenbelt, Maryland, made sure astronaut Scott Kelly could reach home for the entire 340 - day duration of his mission. (sciencedaily.com)
For NASA's work to be worth it, the funding needs to be there for the duration of each mission — or all the time, money, and research that goes into a given space exploration mission can end up being all for nothing. (businessinsider.com)