| The Arecibo message was composed of the digital bits "one" and "zero". A "one" was represented by an "on" radio pulse; a "zero" was represented by an "off" radio pulse. (The message starts: 000000101010100....). This picture was generated by arranging the 1679 bits into 23 columns of 73 rows, 23 and 73 being the two prime numbers, which, when multiplied together, equal 1679. A box representing a "one" is black, while a box representing "zero" is white. |
