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Voyager 1 is almost one light-day away from earth
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Voyager 1 is almost one light-day away from earth

So: Voyager 1 is nearing a remarkable milestone, reaching a distance light travels in one day - about 16.09 billion miles from Earth. A signal will take 24 hours to reach the probe, and another 24 hours for its reply to return, making every exchange a remarkable exercise in patience. Since entering interstellar space in 2012, Voyager 1 has been sending back valuable readings about plasma, magnetic fields, and how far the Sun’s influence extends. Nearly 50 years after launch, the probe is still working, while its team carefully conserves power to keep its science going.
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