Washington — An unmanned SpaceX Dragon capsule carrying freight blasted off to head back to Earth on Sunday. NASA images showed the Dragon as it undocked from the International Space Station (ISS), loaded with two tons of scientific equipment and blood samples provided by the crew. The crew, made up of US astronauts Kayla Barron and Thomas Marshburn and German astronaut Matthias Maurer, sent the blood tests to be used as part of medical examinations into the effects of long-term space travel on people's eyesight. The Dragon capsule was originally due to depart for Earth on Friday but NASA postponed the manoeuvre due to bad weather in Florida.The Dragon is now scheduled to leave Earth's orbit on Monday and splash down off the coast of Florida, assisted by parachutes.The Falcon 9 rocket had brought hardware, research material and supplies for the crew to the ISS.

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