SpaceX has completed an unprecedented commercial rocket mission using its Falcon Heavy rocket to send a telecommunications satellite into orbit for Saudi Arabia-based firm Arabsat. The launch also marked the first time SpaceX has managed to bring all three of the rocket’s boosters back to Earth successfully after a flight. One of the greatest advantages of the Falcon Heavy is the reusability of its boosters, which minimises spaceflight costs. The vehicle’s upgraded rocket cores also make it…