NASA has set target launch dates for the final eight space shuttle flights before the program is mothballed in 2010. That makes a total of 10 flights between now and retirement: one mission in October to upgrade and repair the Hubble Space Telescope, followed by nine more to finish assembly of the International Space Station (ISS), starting in November with a mission to repair faulty rotary joints in the station's movable solar panels. Five missions are scheduled for next year, including deliveries of the station's final solar panels and the final components of the Japanese "Kibo" laboratory module. Three flights are set for 2010, with the final one slated to go up on May 31. The shuttle program will be officially retired on September 30, 2010, to make way for the Constellation program, designed to take U.S. astronauts back to the moon by 2020.