In 2006 a pulse of this type of beam sent a message a record 15 million miles to the MESSENGER spacecraft
..... Inscribing a message in matter and transporting it to an 
interstellar... [DOC] [TLE] Robert H. Goddard and His Rockets | NASA [PAR] Mar 23, 2008 ... LAGEOS carries a plaque designed by Carl Sagan to be a message to future 
civilizations.