Which probe has left the solar system

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The Sciences. Voyager 2, looking back. Newsletter Sign up for our email newsletter for the latest science news. Sign Up. Pioneer 10 flies past Jupiter as the first mission to the giant planet. The Pioneer plaque is a gold-anodized aluminum plate with these images engraved onto it.

The Voyager golden record left is a inch gold-plated copper disc. Credit: NASA. Credit: Astronomy: Roen Kelly. Already a subscriber? Want more? More From Discover. Recommendations From Our Store. Stay Curious. Jonathan O'Callaghan is a freelance journalist covering commercial spaceflight, space exploration and astrophysics. Follow Jonathan O'Callaghan on Twitter. Already a subscriber? Sign in.

Thanks for reading Scientific American. Create your free account or Sign in to continue. For example, Voyager 2 detected a continuous change in magnetic field directions as it crossed into the ISM, whereas Voyager 1 did not. It will be some time before we have more data to study. The only functional probe that has any hope of reaching the heliopause is New Horizons, which is currently flying through the Kuiper Belt.

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If you continue to get this message, reach out to us at customer-service technologyreview. Skip to Content. The bubble is leaking—both ways. The boundary of the bubble is more uniform than we thought. The makeup of the heliopause itself can vary by location. Deep Dive.