This 'Cosmic GPS' Tech Will Help Us Explore the Furthest Reaches of Space

This 'Cosmic GPS' Tech Will Help Us Explore the Furthest Reaches of Space: NASA engineers recently showed off a proof-of-concept for a large-scale 'cosmic GPS.' In the same way GPS can triangulate the location of a mobile phone using satellites orbiting the earth, the tech could one day guide unmanned robotic spacecraft through space using pulsars.