astrosphere.

A region around a star shaped by its outward stellar wind and the wind’s interaction with the surrounding interstellar medium.

Use it for

Words that belong together

• a stellar astrosphere
• the edge of an astrosphere

On the page

The probe entered the star’s astrosphere before its instruments registered the denser flow.

The model placed the astrosphere’s boundary well beyond the outer planet.

Usage notes

Primary category: sci-fi. Forms: Singular astrosphere; plural astrospheres. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.