Last month, Project “Sónar Calling GJ 273b” was planned and executed by METI (Messaging to Extraterrestrial Intelligence) and the Institute of Space Studies of Catalonia in Spain, led by the Sónar music festival. As a video by Tech Insider explains:
“On Oct. 16, 17, and 18 a team of musicians and scientists sent a message to aliens. They sent the message via radio waves and transmitted it 9 different times. This helps ensure that all the information reaches its destination.
“What’s in the message?
“Thirty-three musical pieces, each 10 seconds long, a tutorial on how humans keep time, and when we will be listening for a response…This is the first radio message of its kind designed for a direct response at a specific time.”
Tech Insider also notes that “GJ 273b lives in another star system 12 light years away,” meaning that “if intelligent life responds we could make first contact in just 24 years.”