heliosphere
nounEtymology From helio- + -sphere.
1
Astronomy, Natural sciences 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.
- The heliosphere isn’t really a sphere at all, more an elongated teardrop shape.2023, Martin MacInnes, In Ascension, Atlantic Books, page 397:
- Derived terms
- inner heliosphere, outer heliosphere
- Related terms
- heliospheric