Voyager 1 Set to Sit One Light-Day From Earth
NASA's Voyager 1 spacecraft is about to reach a milestone: sitting one light-day away from Earth. It would be the first human-made object to do so, according to the headline.
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Context: Voyager 1 launched in 1977 and is now the most distant spacecraft from Earth, still sending data from interstellar space. One light-day is about 26 billion kilometres, the distance light travels in a single day.