NASA’s Voyager 1 left Earth in 1977; now its signal takes over 22 hours to reach us and it is still sending data

Nearly 49 years after its launch, NASA's Voyager 1 continues to send data from around 25 billion kilometres away, making it the most distant human-made object in space. As its power supply slowly declines, NASA is carefully switching off onboard systems to keep the spacecraft operational. Voyager 1 is also expected to reach another milestone in 2026, when a signal from Earth will take a full 24 hours to reach it.

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