[Update: November 16, 2018]
Google Doodle Celebrates Arecibo Message, the First Broadcast into Space
In 1974, scientists sent humankind’s first, three-minute long interstellar radio message – the Arecibo Message – and 44 years later, Google on Friday celebrated the feat with a Doodle.
The Arecibo message is a 1974 interstellar radio message carrying basic information about humanity and Earth sent to globular star “cluster M13” 25,000 light years away, with a hope that extraterrestrial intelligence might receive and decipher it.
The message was sent from the Arecibo Observatory in Puerto Rico. It had exactly 1,679 binary digits (210 bytes) which, if arranged in a specific way, can explain basic information about humanity and earth to extraterrestrial beings.