Avoiding satellite collisions: NOAA unveils prototype warning system

A new collision-warning system could help satellite operators sleep a little easier. The prototype system, developed by the U.S. National Oceanic and Atmospheric Administration (NOAA), is designed to alert operators when their spacecraft may be on a collision course with another object. That's a real and growing concern, given how crowded Earth orbit is becoming. More

(Source: Space.com - Feb 22)