In 1977, NASA created two LP records with tracks of global music, greetings in different languages, sounds of the planet, and sonified images, and then attached them to the two robotic probes launched that year as part of the Voyager space mission bound for the outer solar system and beyond. This Golden Record, said Alexander Rehding, Fanny Peabody Professor of Music, is “effectively a mixtape for extraterrestrial civilizations, a sign that we exist and a glimpse of what human culture is about.”
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Source: Phys.org