Cover of book Murmurs of Earth: The Voyager Interstellar Record by Carl Sagan

In 1977, two extraodinary spacecraft called Voyager were launched to the stars. Affixed to each Voyager craft was a gold-coated copper phonograph record as a message to possible extra-terrestrial civilizations that might encounter the spacecraft in some distant space and time. Each record contained 118 photographs of our planet; almost 90 minutes of the worlds greatest mu

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