Heliosphere

n. (Astronomy) region around the sun, region within the boundary of the heliopause that includes the Sun and solar system

The heliosphere is a bubble in space "blown" into the interstellar medium (the hydrogen and helium gas that permeates the galaxy) by the solar wind. Although electrically neutral atoms from interstellar space can penetrate this bubble, virtually all of the material in the heliosphere emanates from the Sun itself.
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Noun
1. the region inside the heliopause containing the sun and solar system
(hypernym) region, part
(part-holonym) Milky Way, Milky Way Galaxy, Milky Way System
(part-meronym) solar system