National Geographic : 2010 Jul
SPACE LASERS could nudge small bits of junk into decaying orbits. Vanguard 1, a U.S. Navy probe launched in 1958, is the oldest orbital debris. COLLECTOR SATELLITE MICRO ROVER SATELLITE DEFUNCT SATELLITE TETHER SPACEBORNE LASER COLLECTOR SATELLITES could capture large junk in nets and release it into lower orbit, from which it would reenter the atmosphere. ELECTRIC TETHERS attached by micro-rovers could drag space junk down as the current in the tether interacts with Earth's magnetic field.