'astrosphere' originates from Modern English combining Greek elements: 'astron' (Greek) meaning 'star' and 'sphaira' (Greek) meaning 'sphere', with the combining form '-sphere' adopted into English from Greek via scientific New Latin.

'astrosphere' was coined in the 20th century by analogy with formed scientific compounds such as 'biosphere' and 'heliosphere', combining Greek 'astron' + English '-sphere' (from Greek 'sphaira').

Initially coined to denote the 'sphere' around any star influenced by its wind and magnetic field; the meaning has remained essentially the same, used in astrophysics to describe a star-dominated region of space.