junk
Space junk on 5,800-mph collision course with moon
It may take weeks, even months, to confirm the impact through satellite images.
Satellite uses space junk clear-up technology for first time
Nasa tracks more than 20,000 pieces of debris larger than a cricket ball orbiting the Earth at speeds of up to 17,500mph.
Space junk mission set for launch
A British-designed craft will demonstrate how to net and spear orbiting objects.