After 46 years of traversing deep space, NASA’s twin Voyager spacecraft are showing signs of wear and tear. Their aging computers occasionally exhibit puzzling behavior, their thrusters are showing signs of wear, and their fuel lines are becoming increasingly clogged. Approximately half of their scientific instruments no longer transmit data, and their power reserves are gradually diminishing.
Nevertheless, a dedicated team of engineers and scientists at NASA’s Jet Propulsion Laboratory is diligently working to maximize the remaining potential of these two remarkable spacecraft. The Voyager program represents the only two human-made vehicles journeying through interstellar space, which is the vast region of thin gas beyond the influence of the Sun’s solar wind. Despite their age, the Voyagers continue to provide valuable insights and data as they venture deeper into the cosmos.
Suzanne Dodd, the Voyager project manager at JPL, explained in an interview with Ars that these measures are being implemented to extend the mission’s lifespan. Voyager’s instruments continue to investigate cosmic phenomena, magnetic fields, and the plasma environment in interstellar space, although they no longer capture images. Both spacecraft have ventured beyond the heliopause, the boundary where the solar wind from the Sun meets the interstellar medium.
“These two spacecraft are still operating, still returning uniquely valuable science data, and every extra day we get data back is a blessing,” Dodd emphasized. After 46 years
However, redundancy in spacecraft is a standard practice, and engineers typically have backup systems in place. Yet, on the Voyagers, redundancy is no longer an option. This means that a failure of a single component in a particular section of the spacecraft could potentially disrupt the entire mission.
Dodd further explained, “Everything on both spacecraft is single-string. There are no backup capabilities left. In some cases, we powered off components to conserve power, all in the effort to keep the instruments running.” This underscores the dedication of the team working to prolong the Voyagers’ valuable mission, despite the challenges of maintaining aging spacecraft.