There are currently around 25,000 objects of space debris larger than 10 centimetres in size orbiting the planet, and between 600,000 and 900,000 pieces of non-trackable debris that could pose a risk to spacecraft and satellites. The ISS had already had to conduct an avoidance manoeuvre in June to avoid fragments of Cosmos 1408, as the fragments could have passed within about half a mile (0.8km) from the station. How is the space debris endangering the international space station ?

