NASA's 1977 computers aboard Voyager are still working in interstellar space

Reddit noticed. NASA confirmed the consequence.

It has been reported that a Reddit thread drew fresh attention to a simple, astonishing fact: the computers built into NASA's Voyager 1 and 2 — hardware designed and assembled in 1977 — are still functioning as the probes drift through interstellar space. Hard to believe? Sure. But there it is: cold-war era electronics whispering telemetry back to Earth across billions of miles.

Built to last, not flashy

The Voyagers were never about raw processing power. They were engineered for endurance: redundant systems, radiation-hardened components and a deliberately conservative software set keep the spacecraft doing the one thing they must — send back data. Power comes from radioisotope thermoelectric generators, not solar panels, so the machines can keep sipping energy decades after launch. Commands and scientific data still traverse the gulf via NASA's Deep Space Network, albeit with light-travel delays measured in many hours. Small, careful workarounds by engineers over the years — rerouting tasks, switching to backups, tightening power budgets — have extended their useful lives beyond what anyone expected.

Why we should care

There's a poignancy here. A pair of 1970s computers — the equivalent of punch-card-era engineering — continues to teach us about the edge of the Sun's influence and the space beyond. It's a lesson in frugality and foresight for future missions: complexity isn't always the answer. And yes, it's a little romantic too. In an age of constant upgrades and planned obsolescence, these aging machines keep sending messages from the void. Who wouldn't feel a chill at that?

Sources: reddit