Humanity’s First Steps to the Stars
In 1974, astronomers sent a radio message from the Arecibo telescope toward the Great Hercules Star Cluster (M13), 25,000 light-years away, as a “postcard” to any extraterrestrial intelligence that might be there. The message contained information about Earth, its inhabitants, and DNA.
In 1974, astronomers sent a radio message from the Arecibo telescope toward the Great Hercules Star Cluster (M13), 25,000 light-years away, as a “postcard” to any extraterrestrial intelligence that might be there. The message contained information about Earth, its inhabitants, and DNA.