Code, play and command your space droid – students across Europe can bring a squadron of minisatellites to life on the International Space Station as the ultimate space robot game. br br For the fourth year, the Zero Robotics tournament will turn the Station into a gaming arena for upper secondary-school pupils. The competition challenges youngsters to write instructions that control volleyball-sized satellites through a virtual field mined with obstacles. br br The Spheres − short for Synchronised Position Hold, Engage, Reorient, Experimental Satellites – obey remote commands and can hover around the weightless Station using their own power, propulsion and navigation. br br The tournament is not only about writing a computer code. Participants must solve problems, apply their maths and physics knowledge and work in teams to achieve success.