Space shuttle Endeavour rocketed toward the international space station Thursday as engineers on Earth pored over launch pictures that showed debris breaking off the fuel tank and striking the craft. Mission Control told the astronauts late Wednesday that the damage looked less extensive at first glance than what occurred on the last shuttle flight, but it will take days to sort through available data to reach a conclusion. Endeavour's liftoff early Wednesday evening was the sixth try and came more than a month late. It occurred on the eve of the 40th anniversary of the launch of man's first moon landing mission. The shuttle had been grounded by hydrogen gas leaks last month and, since the weekend, thunderstorms. Eight or nine pieces of foam insulation came off the external fuel tank during liftoff, and Endeavour was hit at least two or three times, said Bill Gerstenmaier, NASA's space operations chief. The impacts that occurred not quite two minutes into the flight were around the edge of the shuttle where the right wing joins the fuselage. At a news conference, Gerstenmaier noted that the Endeavour crew has shuttle repair kits on board. In case of irreparable damage, the astronauts could move into the space station for two to three months and await rescue by another shuttle. When commander Mark Polansky and his crew catch up with the space station, it will be the first time 13 people are together in space. All of the major space station partners will be represented. The combined crews will have seven Americans, two Canadians, two Russians, one Japanese and one Belgian.