Arecibo message/1974

See  post /Chilbolton 2001.

Aracibo radio telescope, the largest on earth.

We, humans sent a message into space in 1974  from Arecibo, Puerto Rico. The content of the radio message was compiled by Carl Sagan, Frank Drake and NASA.

Carl Edward Sagan November 9, 1934 – December 20, 1996) was an American astronomer, astrophysicist/ cosmologist/ author/science communicator, and in astronomy and natural sciences. He published more than 600 scientific papers and articles and was author, co-author or editor of more than 20 books. He advocated scientifically skeptical inquiry and the scientific method, pioneered exobiology and promoted the Search for Extra-Terrestrial Intelligence(SETI)

Frank Donald Drake Phd is an American  astronomer/ astrophysicist He is most notable as one of the pioneers in the search for extraterrestrial intelligence, including the founding of  SETI mounting the first observational attempts at detecting extraterrestrial communications in 1961 in Project Ozma and developing the Drake equation, and as the creator of the Arecibo Message a digital encoding of an astronomical and biological description of the Earth and its lifeforms for transmission into the cosmos.

We received an answer back in 2001 in Chilbolton, England.