"Arecibo Message" redirects here. For the 2009 Boxcutter album, see Arecibo Message (album).
This is a demonstration of the message with color added to highlight its separate parts. The binary transmission sent carried no color information.
The Arecibo message is an interstellar radio message carrying basic information about humanity and Earth that was sent to the globular cluster Messier 13 in 1974. It was meant as a demonstration of human technological achievement, rather than a real attempt to enter into a conversation with extraterrestrials.[1][2]
The message was broadcast into space a single time via frequency modulated radio waves at a ceremony to mark the remodeling of the Arecibo Telescope in Puerto Rico on 16 November 1974.[2][3] The message was aimed at the current location of M13, about 25,000 light years from Earth, because M13 was a large and relatively close collection of stars that was available in the sky at the time and place of the ceremony.[4] When correctly translated into graphics, characters, and spaces, the 1,679 bits of data contained within the message form the image shown here.[5]
^The Staff at the National Astronomy and Ionosphere Center (December 1975). "The Arecibo message of November, 1974". Icarus. 26 (4): 462–466. doi:10.1016/0019-1035(75)90116-5.
^ abSteele, Bill (1999-11-12). "Cornell News: It's the 25th anniversary of Earth's first (and only) attempt to phone E.T." Cornell News. Archived from the original on 2008-08-02. Retrieved 2008-03-29.
^Johnson, Steven (2017-06-28). "Greetings, E.T. (Please Don't Murder Us.)". The New York Times.
^Klaes, Larry (2005-11-30). "Making Contact". Ithaca Times. Archived from the original on 2009-01-07. Retrieved 2007-07-27.
^Cassiday, George. "The Arecibo Message". University of Utah. Retrieved 2013-10-13.[permanent dead link]
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