Carl Sagan with a ‘galactic greeting card’ plaque that went into space on Pioneer 10 in 1972 (one also went on Pioneer 11 in 1973).

Source

jaykirsch: Plaque details: https://en.wikipedia.org/wiki/Pioneer_plaque

kibblznbitz: Everything I ever see about Carl Sagan just provides more evidence that he was easily one of the most – if not the most – forward thinking and genteel people of all time.