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In 1977, NASA launched Voyager 1 carrying a gold-plated copper record with a one-billion-year lifespan, holding greetings in 55 languages, 115 images and a 90-minute music selection — even though the craft will not pass near another star for about 40,000 years.

NASA's Voyager 1, launched September 5, 1977, carries a gold-plated copper record designed to survive a billion years — a message for a reader it will not reach for 40,000 years.

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