Scientists made the discovery by using a new computer model, which is based on data from NASA's twin Voyager probes. The unmanned Voyager 1 and Voyager 2, which launched in 1977, are plying the outer reaches of our solar system, a region known as the heliosheath.
The new discovery suggests that researchers will need to revise their views about the solar system's edge, NASA officials said. A more detailed picture of this region is key to our understanding of how fast-moving particles known as cosmic rays are spawned, and how they reach near-Earth space."
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