Voyager 2 is About to Cross the Termination Shock — Universe Today

Voyager 2 is about to cross the termination shock, the point where the sun’s particles slow to subsonic speeds. This “solar wind” is flowing at supersonic speed as it leaves the sun, but due to the resistance of the “interstellar wind” flowing the other way, it slows down to subsonic speed at the termination shock.

The next level is the heliopause, which is the area where the solar wind is completely halted, and at which point the Voyager 2 spacecraft will officially be outside of our solar system.

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