Heliosphere
The vast bubble of solar wind and magnetic field that surrounds the entire Solar System, carving out a cavity in the surrounding interstellar medium and shielding the planets from a fraction of the galactic cosmic rays.
Imagery
Voyager 2: Hello Interstellar Space, Goodbye Heliosphere
At the end of 2018, the cosmic ray subsystem (CRS) aboard NASA's Voyager 2 spacecraft provided evidence that Voyager 2 had left the heliosphere (the plasma bubble the Sun blows around itself).
2018
NASA/JPL-Caltech/GSFC · NASA media (public domain)
Environment & effects
Knowledge connections
- Associated withThe Sun
- Associated withSolar Wind
- ContainsHeliopause
- Associated withThe Termination Shock
- Associated withThe Heliosheath
- Associated withThe Heliospheric Bow Wave
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.