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Nature 426, 48-51 (6 November 2003) | doi:10.1038/nature02066;

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Enhancements of energetic particles near the heliospheric termination shock

The spacecraft Voyager 1 is at a distance greater than 85|[thinsp]|au from the Sun, in the vicinity of the termination shock that marks the abrupt slowing of the supersonic solar wind and the beginning of the extended and unexplored distant heliosphere. This shock is expected to accelerate |[lsquo]|anomalous cosmic rays|[rsquo]|, as well as to re-accelerate Galactic cosmic rays and low-energy particles from the inner Solar System.

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