Planned satellite megaconstellations could generate runaway space debris

Sixteen thousand satellites currently whiz above our heads on a 3D space superhighway. To the consternation of astronomers and dark-sky lovers, that number may increase 10-fold within the next decade as operators launch internet and telecoms satellites en masse. If SpaceX CEO Elon Musk gets his way, the number could breach 1 million not long after. More

(Source: Science - Aug 8)