It may sound like something out of science fiction, but on Wednesday, part of a rocket weighing 4,000 kg crashed onto the moon at seven times the speed of sound. ⁣ ⁣ Belonging to Elon Musk's fleet of Falcon 9 rockets, the 'stage' had been in orbit around the earth for 18 months. As the dust settled (literally), CGTN Europe asked whether the collision was anything to worry about.⁣ ⁣ #SpaceX #SpaceJunk #SpaceDebris #MoonCrash #Falcon9 #ElonMusk⁣