SpaceX launches fifth resupply rocket to International Space Station

Space transport services company SpaceX launched their fifth Dragon resupply vehicle to the International Space Station yesterday. The spacecraft — containing more than 2,200kg (5,000 pounds) of food, experiments, and spare parts — successfully decoupled from the launch rocket and should reach the station early tomorrow.

The launch was postponed from Tuesday because of a technical issue on the second stage of the rocket. The shipment includes replacements for cargo aboard the spaceship Cygnus, destroyed during a failed launch in October. Cygnus belonged to the rival Orbital Sciences Corporation.

SpaceX tried unsuccessfully to land the Falcon 9 delivery rocket for reuse. The rocket reached an unmanned barge in the Atlantic, but landed too hard. SpaceX CEO Elon Musk said the landing "bodes well for the future, though". The attempted salvage of the rocket was experimental, using new retractable fins. Next time they will add extra hydraulic fluid, Musk said.

The ship's support equipment was damaged but, according to Musk, the barge is intact. Last year saw two successful SpaceX splashdowns but landing on such a small target as a ship is unique.