NASA’s Voyager 1 at outer reaches of solar system, poised to enter interstellar space.

This artist’s concept shows plasma flows around NASA’s Voyager 1 spacecraft as it gets close to entering interstellar space. Image released Dec. 3, 2012. (NASA/JPL-Caltech/The Johns Hopkins University Applied Physics Laboratory)
Image credit: Defense Video Imagery Distribution System: (DVIDS).
Image credit: Diagram of solar system, Voyager 1 and 2 and the planets by