So much junk is filling Earth's orbit that collision avoidance has become ... astronauts on the International Space Station get debris alerts and prepare to evacuate if the station is struck.

Each one poses a hazard to the International Space Station — here's how they avoid hitting each one. Produced by Matt Stuart. Video courtesy of NASA. Follow TI: On Facebook More from Tech There ...

managing orbital debris remains a critical challenge for space operations. 'Mass extinction': Scientists predict Earth’s demise, and the clock is ticking faster than ever 'A tunnel from London ...

China's Tiangong-1 space station fell to Earth on April 2, raining debris over a patch of Pacific Ocean some 2,500 miles south of Hawaii. But Tiangong-1 is just the tip of the space-junk iceberg.

Space junk has filled up so much of Earth's orbit that it's endangering satellites and astronauts. The company Kayhan Space issues roughly 1,000 space-collision warnings per day. Earth-orbit ...

Space junk has filled up so much of Earth's orbit that it's endangering satellites and astronauts. The company Kayhan Space issues roughly 1,000 space-collision warnings per day. Earth-orbit experts ...