Heliopause meaning

hēlē-ə-pôz
The outer boundary of the heliosphere.
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The outer boundary of the heliosphere.
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The region surrounding the solar system at which pressure from the outgoing solar wind equals the pressure from the interstellar medium (made up mostly of hydrogen and helium), and the solar wind can penetrate no further. It is considered to be the outer boundary of our solar system.
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(astronomy) The boundary of heliosphere where the Sun's solar wind is stopped by the interstellar medium.
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