heliopause

he·li·o·pause  (hl--pôz)

n.

The area in which the outgoing solar wind and the incoming plasma from interstellar space meet. It is the boundary of our solar system.

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heliopause [ˈhiːlɪəʊˌpɔːz]

n

(Astronomy) the boundary between the region of space dominated by the solar wind and the interstellar medium

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heliopause  (hl--pôz)

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. See more at solar wind.

Thesaurus

Noun

1.

heliopause - the boundary marking the edge of the sun's influence; the boundary (roughly 100 AU from the sun) between the interplanetary medium and the interstellar medium; where the solar wind from the sun and the radiation from other stars meet boundary, bounds, bound - the line or plane indicating the limit or extent of something