CAPE CANAVERAL, Fla. -- Preliminary analysis of Discovery's launch Saturday identified about five pieces of foam breaking free from the tank and at least one piece hitting the orbiter.

IMAGES: Discovery Launches | Foam Falling

The biggest of the pieces seen on film came off more than three minutes into the flight. A piece appears to hit the orbiter and bounce off at a sharp angle.

However, while the images might look alarming, they actually show something that eases NASA's concern, Local 6 News partner Florida Today reported.

The piece of foam hits the orbiter at a sharp angle and, after bouncing off, clearly appears intact. That means the foam was not broken or obliterated as pieces of foam do when they strike the orbiter earlier in the flight profile.

Space operations Chief Bill Gerstenmaier told Florida Today that a full analysis will be done using launch films, pictures of the external tank taken after separation in orbit and high-resolution detail photographs of the orbiter's belly as it approaches the space station on Monday.

"They were all late," Gerstenmaier said. "They looked thin and, therefore, they're lightweight. They don't appear to be any impact to us at all."

Discovery is flying with a new-style tank redesigned to reduce foam loss after the Columbia accident in 2003.

Mission Begins

Earlier, Discovery roared into a brilliant blue sky dotted with a few clouds at 5:02 p.m. Saturday, right on time.

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IMAGES: Discovery Launches

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"A perfect ascent," NASA spokesman Rob Navias said as Discovery separated from its external tank.

Once at the space staion, Discovery's crew will unload and install a $1 billion lab and hand-deliver a specially made pump for the outpost's finicky toilet.

The school-bus-size lab, named Kibo, Japanese for hope, will be the biggest room by far at the space station and bring the orbiting outpost to three-quarters of completion.

The Japanese lab is 37 feet long and more than 32,000 pounds, and fills Discovery's entire payload bay. The first part of the lab flew up in March, and the third and final section will be launched next year.

The entire lab, with all its pieces, cost more than $2 billion.

A large political contingent was also on hand led by Rep. Gabrielle Giffords, D-Ariz., who's newly married to Kelly, Discovery's commander. They invited numerous bigwigs from Arizona and Washington.

Giffords acknowledged being nervous, far more so than the day she was elected to Congress in 2006.

"It's a risky job. I'm pleased that the vehicle's in good shape, the weather is beautiful. They've had no problems," she told The Associated Press. "But you don't really relax" until the shuttle is back from its two-week mission.

Kelly's brother, Scott, didn't need an invitation to the launch -- he's also a space shuttle commander. They're identical twins. Scott Kelly said it was more nerve-racking to watch his brother launch than to be strapped in himself. Their parents and 91-year-old grandmother are always anxious on launch day, he said.

"I know my grandmother, she would rather I work at Wal-Mart," Scott Kelly said, chuckling, before liftoff.

Three spacewalks are planned during Discovery's 14-day flight, to install Kibo, replace an empty nitrogen-gas tank and try out various cleaning methods on a clogged solar-wing rotating joint. The shuttle crew is made up of six Americans and one Japanese.

The space station's two Russian residents, meanwhile, will put in the new toilet pump. For more than a week, the three occupants have had to manually flush the toilet with extra water several times a day, a time-consuming, water-wasting job.

NASA and Russian space officials are hoping that the pump -- which was rushed to Kennedy Space Center from Moscow just this past week -- gets the toilet back in normal working order.

One of Discovery's astronauts, Gregory Chamitoff, will move into the space station for a six-month stay. He'll replace Garrett Reisman, who will return to Earth aboard the shuttle.

Also hitching a ride to the space station is Buzz Lightyear, who has long been yearning to soar "to infinity and beyond." The 12-inch action figure -- made famous in the 1995 Disney film "Toy Story" -- is part of NASA's "toys in space" educational program for elementary students and their teachers.

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