NASA: Extended ISS mission not confirmed

NASA says a rumored one-year endurance mission to the International Space Station is just an idea despite a Russian report it would take place in 2015. Russia\'s Interfax news agency quoted an unnamed source within Russia\'s Roscosmos Federal Space Agency as saying an American and a Russian would take part in the one-year mission that would be twice the duration of current deployments to the ISS. NASA responded by saying such a mission hasn\'t gone beyond the talking stage. \"We are exploring the idea of a one-year increment as part of preparations for exploration beyond low-Earth orbit,\" NASA spokesman Kelly Humphries of Johnson Space Center in Houston told SPACE.com. \"But the discussion is very preliminary and no official decisions have been made.\" Spending a year on the space station could give scientists an opportunity to study long-term effects of spaceflight such as would be experienced by astronauts on a mission to Mars, which would likely take two years to complete, SPACE.com said.