
1) Part 2) Region
Found on
https://www.crosswordclues.com/clue/heliosphere

The heliosphere is a vast region of space surrounding the Sun, a sort of bubble filled by the interplanetary medium and extending well beyond the orbit of Pluto. Plasma `blown` out from the Sun, known as the solar wind, creates and maintains this bubble against the outside pressure of the interstellar medium, the hydrogen and helium gas that per.....
Found on
http://en.wikipedia.org/wiki/Heliosphere

a vast region around the sun dominated by the solar wind.
Found on
http://planetfacts.org/space-terms/

The space within the boundary of the heliopause, containing the Sun and solar system.
Found on
http://www.braeunig.us/space/glossary.htm

(from the article `heliopause`) boundary of the heliosphere, the teardrop-shaped region around the Sun that is filled with solar magnetic fields and the outward-moving solar wind ...
Found on
http://www.britannica.com/eb/a-z/h/33

The region of space, surrounding the Sun, which is inflated by the solar wind and within which the Sun exerts a magnetic influence. Despite its name, the heliosphere is almost certainly greatly elongated due to the movement of the Sun with respect to the interstellar medium. It is bounded by the hel...
Found on
http://www.daviddarling.info/encyclopedia/H/heliosphere.html

The space within the boundary of the heliopause, containing the sun and solar system.
Found on
http://www.encyclo.co.uk/visitor-contributions.php

The space within the boundary of the heliopause containing the Sun and the Solar System.
Found on
http://www.seasky.org/astronomy/astronomy-glossary.html

The space within the broundary of the heliopause containing the Sun and solar system.
Found on
http://www.solarviews.com/eng/terms.htm

[
n] - the region inside the heliopause containing the sun and solar system
Found on
http://www.webdictionary.co.uk/definition.php?query=heliosphere

heliosphere The region of space where solar and planetary particles and magnetic fields are dominant.
Found on
http://www.wordinfo.info/words/index/info/view_unit/963/4
noun the region inside the heliopause containing the sun and solar system
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.