On August 20, 1977, NASA launched Voyager 2, embarking on an audacious planetary "Grand Tour" enabled by a rare alignment of the outer planets. Packed with scientific instruments and the iconic Golden Record, the probe’s computing architecture was astonishingly lean by modern standards—its three redundant computer systems wielded less memory than an average digital watch today. Yet, through brilliant low-level reprogramming and remote debugging across billions of miles, engineers kept the craft evolving in flight. Voyager 2 went on to deliver our first close-up portraits of Uranus and Neptune before crossing the heliopause into interstellar space. More than four decades later, this 1970s silicon-and-plutonium marvel still transmits telemetry back to Earth, serving as humanity's ultimate testament to engineering resilience, long-range protocol design, and relentless curiosity.