Mars is…

Mars is here – down to the metre

Want to navigate over huge distances with nearly superhuman accuracy? All you need is a laptop, the right software, and some way to keep track of the signals of distant pulsars.…

Read more http://go.theregister.com/feed/www.theregister.co.uk/2013/08/26/pulsars_the_gps_beacons_of_the_cosmos/