This close-up view of Jupiter was taken by Voyager 1. It shows the great red spot—an anticyclone three and a half times the size of Earth, as well as the clouds swirling around it. The image was ...

Voyager 1 is more than three times farther than that and yet still within the Sun’s domain. Our mighty star currently shines on the probe with the brightness of more than a dozen full moons.

and Voyager 1 is more than 15.5 billion miles away. At this point, the Voyagers are tasked with studying the interstellar medium found beyond the influence of the sun. Scientists will have ...