This artist’s concept shows Voyager 1 entering the interstellar medium. (Credit: NASA/JPL-Caltech)

1. High-Gain AntennaSHUTDOWN DATE: Still activePURPOSE: CommunicationsKEY FINDING: This is the craft’s main contact point with Earth. It once sent back the robust data from the craft; today, it sends out basic information from the low-power instruments still online.2. Magnetometers and Low-Field MagnetometerSHUTDOWN DATE: Still activePURPOSE: Measure the magnetic fields of the Sun and the outer