NASA's Voyager 1 closes in on a light day in interstellar space for a new distance record.
NASA's Voyager 1 is about to become the first human object to come within one light-day of Earth.
NASA's Voyager 1 closes in on a light day in interstellar space for a new distance record.
NASA's Voyager 1 is about to become the first human object to come within one light-day of Earth.
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