NASA’s twin Voyager probes, which launched 47 years ago, are shutting off some science instruments in an effort to conserve power and keep their storied missions going. Voyager 1 and Voyager 2 are both exploring uncharted territory in interstellar space.

A pair of extraordinary space missions that have been headed out of the solar system for almost half a century are getting a new lease on life as NASA engineers order the Voyager 1 and 2 deep-space probes to shut down two instruments to save power.

For nearly five decades, the twin Voyager spacecraft have pushed the boundaries of human exploration, venturing deeper into the cosmos than any other human-made object. As their power dwindles, NASA engineers are making tough choices,