What Is the Arecibo Message? 📡📜– Earth’s first cosmic greeting #space #astronomy #universe #nasa

In 1974, scientists aimed a powerful radio telescope at the globular cluster M13 and sent a message — not to start a conversation, but to show that we could. The Arecibo Message was Earth’s first deliberate, high-powered broadcast into space intended for extraterrestrial listeners. Packed into 1,679 bits of binary code, it contained information about humanity: our numbering system, DNA structure, a figure of a human, and even the design of the Arecibo telescope itself. 🧬👤

Though M13 is 25,000 light-years away — far too distant for a reply anytime soon — the message was a symbolic act, showing that Earth had entered the cosmic stage. It was written by Frank Drake, Carl Sagan, and others, and it helped spark decades of SETI (Search for Extraterrestrial Intelligence) research and debates over how we should communicate with alien civilizations. 🤖👽

The Arecibo Message wasn’t meant to reach aliens — it was meant to reach us. A reminder that we’re part of a much larger universe, and that we may not always be alone.

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