NASA Marks Voyager 1 Reaching One Light-Day From Earth

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NASA's Voyager 1, launched nearly 50 years ago in 1977, is set to reach a distance of one light-day from Earth on Wednesday, November 18. At more than 16 billion miles, or about 25.9 billion kilometers, it is the most distant human-made object. A signal sent from Earth would need 24 hours to reach the spacecraft. NASA is inviting members of the media and the public to take part in activities highlighting the milestone.

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