The "ones" and "zeroes" were transmitted by frequency shifting at the rate of 10 bits per second. The total broadcast was less than three minutes. A graphic showing the message is reproduced here. It ...

The radio message was transmitted on 16 November 1974 from the Arecibo Observatory in Puerto Rico, then the largest single-dish radio telescope in the world. It consisted of a series of binary ...

Exactly 50 years ago, a concrete step was taken – the Arecibo message. Exactly 50 years ago to the day, mankind contacted possible extraterrestrials for the first time with a targeted message.

The Arecibo radio telescope in Puerto Rico transmitted the most powerful known interstellar message in 1974. The facility’s iconic 1,000-foot-wide dish that beamed out the signal collapsed in 2020. A ...

That was the voice of Frank Drake, a late astronomer and astrophysicist who was instrumental in sending what’s now known as the “Arecibo message.” Here to tell us more about humankind’s ...

Broadcast from what was then the world’s largest radio telescope, in Arecibo, P.R., the message was delivered in the direction of M13, a globular cluster of stars about 25,000 light-years away.