The space agency made it official Thursday after weeks of hints of launch delays. Managers agreed to postpone the next-to-last shuttle launch until Nov. 1. Discovery had been scheduled to fly to the International Space Station in September.
The very last mission now has a Feb. 26 launch date. Endeavour will close out the shuttle program by delivering a major scientific instrument to the space station. NASA has said that it will decide in August to make more shuttle launch decisions.