Betekenis van:

Zelfstandig naamwoord
    • the boundary marking the edge of the sun's influence; the boundary (roughly 100 AU from the sun) between the interplanetary medium and the interstellar medium; where the solar wind from the sun and the radiation from other stars meet



    1. The boundary of the solar cavity is the heliopause, about fifty astronomical units from the sun, where the solar wind pressure is down to the tiny pressure between stars in our arm of the galaxy.