NASA makes crucial move to keep its legendary Voyager craft alive

There are only two human spacecraft in interstellar space. And their fuel is dwindling. Voyager 1 — launched in 1977 and now over 15.6 billion miles from Earth— started out with 10 science instruments, but now has just three running after NASA turned off another gadget to conserve its finite nuclear fuel supply. And later this month, the space agency's engineers will turn off another instrument on its exploration sibling, Voyager 2. "The Voyagers have been deep space rock stars since