A 4,000-kg (4-tonne) rocket fragment from Elon Musk's company, SpaceX, has crashed into the Moon after drifting uncontrollably in space for the past 18 months. The rocket debris had been floating aimlessly before being pulled towards the Moon by its gravitational force, eventually striking the lunar surface at extremely high speed. Impact At Nearly 8,700 kmphThe rocket fragment hit the Moon at an estimated speed of 8,690 kilometres per hour. The observations are expected to provide fresh insights into the lunar surface. The incident has also renewed attention on the issue of leaving space debris uncontrolled in orbit, with scientists saying it serves as a reminder for space agencies and companies to avoid abandoning waste in space because of the potential for future accidents.