The U.S. space shuttle Discovery landed safely in Florida Saturday afternoon, after a 13-day mission to the International Space Station.

Discovery touched down at the Kennedy Space Centre in Cape Canaveral at 3:14 p.m. E.T., which was later than originally expected.

Due to clouds and high winds, NASA officials asked the astronauts to continue circling, which delayed the landing by about an hour and a half.

"It's good to be back home," said Discovery commander Lee Archambault, from inside the shuttle once it finally landed.

Solar wings installed

During the two-week mission, astronauts installed a final set of solar panel wings on the space station.

The $300-million addition will allow the space station to generate enough electricity to support an expanded crew, and allow those crew members to carry out more research.

Recycled drinking water

The astronauts returned to Earth with between four and five litres of recycled water, processed from their urine and sweat.

Tests will be conducted on the water samples, and the results are expected to be ready sometime in April.

If the results are positive, residents of the space station will be given the go-ahead to start drinking the water treated by the processor.

With files from News Staff and The Associated Press