Another fun example of braking are the electrodynamic tethers [1], in which you (a satellite) are the copper tube and the entire earth is the magnet! [1] http:

Another fun example of braking are the electrodynamic tethers [1], in which you (a satellite) are the copper tube and the entire earth is the magnet! [1] http://en.wikipedia.org/wiki/Electrodynamic_tether http://en.wikipedia.org/wiki/Electrodynamic_tether