he·li·o·sphere (h  l- -sfîr )n. The region of space through which the solar wind extends. |
| heliosphere (hl--sfîr) The large, roughly elliptical region of space around the Sun through which the solar wind extends and through which the Sun exerts a magnetic influence. The heliosphere extends well beyond the orbits of the planets, and its shape and extent fluctuate with changes to the solar wind and other influences.  The boundary between the heliosphere and interstellar space is known as the heliopause. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | heliosphere - the region inside the heliopause containing the sun and solar system region, part - the extended spatial location of something; "the farming regions of France"; "religions in all parts of the world"; "regions of outer space" Milky Way, Milky Way Galaxy, Milky Way System - the galaxy containing the solar system; consists of millions of stars that can be seen as a diffuse band of light stretching across the night sky solar system - the sun with the celestial bodies that revolve around it in its gravitational field |
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