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The roughly spherical volume of space, centered on the sun and extending into the Kuiper belt, that is composed of particles emitted from the sun and forms a bubble that displaces the interstellar medium.
(Astronomy) the region around the sun outside of which the sun's influence is negligible and interstellar space begins
he•li•o•sphere(ˈhi li əˌsfɪər)
the region around the sun over which the effect of the solar wind extends.
The area of space occupied by the Sun’s magnetic field and gases.
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|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