Voyager 2 was launchedsending back data and thousands of images. It then continued merrily on its way, headed out past the solar system, going where, well, no one we know has ever been before.
Now, 33 years later, Voyager 2 is still headed out, about to leave the solar system. It's about 8.6 billion miles away now, and passing through the heliosphere, the magnetic bubble generated by the sun that surrounds our solar system. But in May, Voyager 2 inexplicably stopped talking.