This Unusual Map Locates Our Solar System in Space and Time

In the 1970s, scientists Frank Drake and Carl Sagan worked together to create a map that would provide directions to our celestial neighborhood—the Solar System. But how do you make a map of space? Their solution was to use pulsars—spinning remains of a supernova—to triangulate where humans could be found in space. Their audience? Any being that might encounter the Pioneer and Voyager Spacecraft as they explore our universe.