Preserving Hydrazine, Preserving Exploration

Hydrazine is a critical rocket fuel that enables spacecraft to maneuver and orient themselves. NASA’s Voyager 1 and 2 spacecraft, launched over 45 years ago, use hydrazine thrusters to keep their antennas pointed at Earth for communications. While only expected to last 5 years, they have long exceeded their life expectancy. Because of the extended lifespan, engineers have seen propellant residue buildup which could finally end the Voyager mission. Engineers sent commands to the spacecraft to reduce the thruster firings in order to continue the 45+ year mission. Their efforts highlight the ongoing importance of hydrazine to space exploration.