The collision has rendered the Russian satellite , used to reflect laser beams , unusable . More space and science news on CNN.com 's Light Years blog . The debris is left over from a 2007 Chinese missile launch on their own weather satellite . Comment: The incident highlights the problem of collisions involving space debris .
The collision has rendered the Russian satellite , used to reflect laser beams , unusable . The debris is left over from a 2007 Chinese missile launch on their own weather satellite . Comment: The incident highlights the problem of collisions involving space debris .