NASA's Voyager probes have traveled through space for nearly 50 years. See the remarkable photos from their journeys.

This montage shows examples of striking images of the solar system taken by Voyager 1 and 2 on their missions. NASA/JPL/Insider Voyager 2 launched into the solar system 49 years ago on August 20, 1977. Together with Voyager 1, the two probes are now billions of miles away from Earth. Here are the extraordinary pictures the probes have taken during their journey through space. Voyager 2, a pioneer in outer solar system exploration, left Earth for interstellar space 49 years ago, on August 20, 1977. The twin of Voyager 1 , which left Earth only a few weeks after, is the only spacecraft to visit all four of the solar system's outer gas giants — Jupiter, Saturn, Uranus, and Neptune. The Voyager probes were originally sent on a four-year mission to tour the solar system, but they exceeded expectations and are still going nearly half a century later.