How Astronomers Tried to Communicate with the Cosmos
Briefly

The Arecibo Observatory was formerly the world's largest radio telescope, spanning 1,000 feet and equipped with a powerful radar transmitter, enabling significant astronomical studies.
Frank Drake emphasized that the Arecibo message made Earth exceedingly visible from far away, marking a pivotal moment in humanity's quest to understand our place in the cosmos.
Read at www.scientificamerican.com
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