Heliosphere · ~85–95 AU
The Termination Shock
The boundary where the supersonic solar wind abruptly slows as it runs into the pressure of the interstellar medium, roughly ninety astronomical units from the Sun. Voyager 1 crossed it in 2004 and Voyager 2 in 2007 — the first direct measurements of this shock.
Highlights
- ›Where the solar wind goes subsonic — crossed by both Voyagers
The Sun, its layers & phenomena
Across solar physics
Knowledge connections
- Associated withThe Sun
- Associated withHeliosphere
- Associated withThe Heliosheath
- Associated withVoyager 1
- Associated withVoyager 2
- Associated withThe Heliosheath
Sources
The primary and reference sources this topic draws on.
- NASANational Aeronautics and Space Administration
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.