CAPE CANAVERAL, Fla., Sept 5 (Reuters) - Space shuttle Atlantis' launch on a final mission to service the Hubble Space Telescope has been delayed because of tropical storms, NASA said on Friday.

Atlantis' target launch date was pushed back two days to Oct. 10, although more delays were possible with Hurricane Ike and Tropical Storm Josephine swirling in the Atlantic.

Atlantis was moved from NASA's assembly building to the seaside launch pad on Thursday in preparation for the mission, several days later than planned because of earlier storms.

NASA plans to dispatch a crew of seven astronauts to install new science instruments, fix broken equipment and replace batteries and gyroscopes on the 18-year-old observatory.

(Reporting by Irene Klotz, editing by Jane Sutton and Bill Trott)

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