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Capsule dumps space station rubbish

The International Space Station has one less capsule and a lot less rubbish after a commercial cargo ship ended its five-week visit.

Nasa astronaut Michael Hopkins used the space station's big robot arm to release the capsule, called Cygnus, as the orbiting lab sailed 260 miles (418 kilometres) above the South Atlantic.

Cygnus is filled with rubbish and will burn up on Wednesday when it plunges through the atmosphere, over the Pacific.

Orbital Sciences launched the capsule last month from Virginia under a 1.9 billion US dollar (£1.1 billion) contract with Nasa. The Cygnus delivered 3,000 pounds (1,360 kilograms) of goods, including belated Christmas gifts for the six-man crew and hundreds of ants for a student experiment.

The ants are still onboard the space station. They will return to Earth aboard another company's cargo ship, the SpaceX Dragon.

SpaceX - or Space Exploration Technologies, based in southern California - will launch its next Dragon from Cape Canaveral in Florida on March 16 with a fresh load of supplies.

Nasa is paying Orbital Sciences and SpaceX to keep the space station stocked. Russia, Japan and Europe also take turns making deliveries.

The SpaceX Dragon is the only craft capable of safely returning a pile of items, now that Nasa's space shuttles are retired. The Russian Soyuz crew capsule has just enough room for three astronauts and a few odds and ends.

A handful of American companies, including SpaceX, are working to develop craft to carry space station crews. Until that happens, Nasa must continue to buy Soyuz seats for its astronauts.

Americans have not launched from US soil since the last shuttle flight in 2011. Nasa expects it will be 2017 before US astronauts rocket into orbit from their homeland.

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