Technically...Fel wrote:Wrong.
The balls would not burn up in an atmosphere, because of their armored shells. They'd impact the planet. They'd be destroyed in that impact, but it would be quite a show.
You said that when the balls smash through something they lose most of their energy. That being the case, most of the balls be moving fairly slowly with respect to the space station, and go into similar orbits. Those who break through a window at high speed will face a differet fate. If the station is in...
LEO: They will all eventually burn up in a coupe of years, as there's still enough air up to 500km altitude to bring anything down. They won't hit much faster than about bullet speed though, as re-entry tends to reduce objects to their mere terminal velocity, rather than mach 25.
GEO: Any ball moving faster than about 3kmps will leave orbit, either escapeing the earth's pull and going into orbit around the sun, or going into a differnt inclination or *reverse* orbit, with very few ever falling to the ground. This will be a long term navigation hazard, with the potential for balls impacting other space craft at up to 15kmps.