SMRTR Science & EngineeringNov 24, 2025Interesting Engineering

Voyager 1: World’s farthest spacecraft nears historic one-light-day from Earth

SMRTR summary

NASA's Voyager 1 spacecraft, launched in 1977, will reach a historic milestone in late 2026 when it becomes the first human-made object to travel one light-day from Earth, meaning radio signals will take 24 hours to reach it. Currently positioned 15.7 billion miles away in interstellar space, the probe will extend to 16.1 billion miles by November 2026, making communication increasingly challenging despite NASA's Deep Space Network capabilities.

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