A Canadian satellite, the Near Earth Object Surveillance Satellite, is designed specifically as an early warning system to pinpoint asteroids on a collision course with Earth. It will also detect space junk in the path of other orbiting satellites to prevent crashes that could shut down telecommunications - television, telephone, GPS and banking systems - around the globe.

The U.S. Air Force intends to field the first system explicitly designed to help counter anti-satellite missiles and other threats, The Rapid Attack Identification Detection Reporting System (Raidrs) Block 20, which they intend for it to collect data from open and classified sources to provide predictability in the event of an ASAT attack.

An article on the community of visual satellite spotters, amateur hobbyists who enjoy the challenge of identifying and tracking government satellites and sharing the information on the internet.

A large American spy satellite has lost power and is expected to crash back to Earth sometime late next month. A spokesman with the U.S. National Security Council refused to speculate on the possibility that the satellite may be shot down by a missile to prevent any debris causing damage.

A large U.S. spy satellite has lost power and could hit the Earth in late February or early March, government officials said Saturday.

A French space-surveillance radar has detected 20-30 satellites in low Earth orbit that do not figure in the U.S. Defense Department's published catalogue, a discovery that French officials say they will use to pressure U.S. authorities to stop publishing the whereabouts of French reconnaissance and military communications satellites.

Almost three weeks after the successful test of a Chinese anti-satellite weapon, the US military has catalogued more than 500 pieces of debris created by the destruction of the obsolete weather satellite Watchdog groups are keeping a keen eye on the space junk, and are using data from the military to learn more about the weapon's capabilities.

The U.S. Air Force is beefing up the service's ability to accurately track and monitor the position of other satellites in space and developing systems that can destroy those viewed as a threat.

The Air Force's new top commander for space predicted on future attacks on U.S. satellites and called for greatly expanded tracking and identification of payloads launched by other countries.

An overview of the U.S. Air Force's space situational awareness efforts which strive to "enhance its knowledge of what's in orbit, as well as its ability to know if American space systems are under attack."