Orbital Sciences Corporation has completed the first test launch of its Antares rocket, successfully deploying a dummy 3.8-tonne spacecraft into low Earth orbit (LEO). The next test flight, due in June, will see the launch of Orbital's Cygnus spacecraft, which will resupply the International Space Station. If that goes well, Orbital will begin a $1.9-billion contract with NASA to deliver eight resupply missions to the ISS.