The Science Channel's "Discoveries This Week" magazine show not only did the solar sail but also:
Saving Space Junk
Communication satellites are big business — they relay television signals, voice and data. The problem is that their life span is limited. A new invention called ConeXpress might give them a longer life. Its job is to hunt down aging satellites and save them from becoming space junk. See how this novel invention can prolong the longevity of telecommunications satellites.
The satellite rescuer uses ion propulsion.
