NASA's Voyager Probes Continue to Transmit from Interstellar Space After Nearly 50 Years
NASA's Voyager 1 and 2, launched in 1977, were initially designed for a five-year mission to explore Jupiter and Saturn. However, nearly 49 years later, both probes remain operational and continue to transmit data from beyond the heliosphere, marking them as the only human-made objects in interstellar space. The mission, managed by NASA and operated by the Jet Propulsion Laboratory, has exceeded its original scope due to a rare planetary alignment that allowed the spacecraft to use gravitational assists to extend their journey. Voyager 1 crossed the heliopause in 2012, followed by Voyager 2 in 2018, enabling them to measure the interstellar environment directly. Despite the challenges of diminishing power from their radioisotope thermoelectric generators, the mission team has managed to keep the probes operational by shutting down non-essential systems and instruments.