heliosphere

From helio- +‎ -sphere.

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heliosphere (plural heliospheres)

1. (astronomy) The region of space where interstellar medium is blown away by solar wind; the boundary, heliopause, is often considered the edge of the Solar System.

   Hypernym: astrosphere

   Hyponyms: inner heliosphere, outer heliosphere

   Hyponyms: bow shock, heliopause, heliosheath, termination shock, solar magnetosphere, solar wind

   • 2023, Martin MacInnes, In Ascension, Atlantic Books, page 397:

     The heliosphere isn’t really a sphere at all, more an elongated teardrop shape.