The 8-track data recorder, a deep-space belt-driven system on a 1,076-foot reel, operated from 1977 until power constraints ended its use in 2007, not due to tape failure.

The Golden Record, curated under Carl Sagan, carries 116 images, greetings in 55 languages, music, and Earth sounds intended as a message to any potential extraterrestrial discoverers.

Voyager 1 is speeding toward the inner edge of the Oort Cloud at about 38,000 miles per hour, with projected power to operate key instruments through around 2036 and to continue transmitting data until further power decline.

In 2012 Voyager 1 crossed the heliopause, becoming the first human-made object to enter interstellar space and providing invaluable measurements of the interstellar medium.

Voyager 1, launched in 1977, remains the farthest human-made object in interstellar space, transmitting data with a modest 69 kilobytes of memory and an 8-track data recorder on a 22.4-watt transmitter.

A 2025 thruster crisis nearly crippled the mission when primary roll thrusters failed and the backup units clogged with silicon dioxide, but NASA engineers revived the system by reactivating power switches, a painstaking process that involved 23-hour one-way command-and-wait cycles.

Among its key discoveries are Io’s volcanism, Jupiter’s atmosphere and rings, a possible subsurface ocean on Europa, and Titan’s thick nitrogen atmosphere observed during the 1980 flyby.

What began as a mission planned for five years has vastly outlived expectations, continuing to deliver unique scientific data from beyond the solar system.

Voyager 1’s onboard systems were built with extreme redundancy and over-engineering, including an assembly-language computer capable of about 81,000 instructions per second, far slower than today’s devices.