Termination-shock meaning

(astronomy) The boundary marking one of the outer limits of the Sun's influence, where the solar wind dramatically slows.
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An outer region of the solar system, about 8 billion miles (12.8 billion kilometers) from the Sun, where a standing shock wave is generated as the solar wind, encountering the interstellar medium, slows to subsonic speeds.
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(astronomy) By extension, that point for space around any star.
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