EXTRATERRESTRIAL EXPLORATION
EXTRATERRESTRIAL EXPLORATION Arecibo_message In 1974, the most powerful interstellar radio message carrying simple, pictorial message (basic information) about humanity and Earth sent to globular star cluster M13 called Arecibo message so that the extra-terrestrial intelligence might receive and decipher it. For a single time the message was broadcast in space via frequency-modulated radio waves as a mark of upgrading or remodelling the Arecibo radio telescope in Puerto Rico on 16 November 1974. The broadcast was particularly powerful because it used Arecibo's megawatt transmitter attached to its 305-meter antenna...