Galactic structure
The Galactic Corona
An enormous halo of tenuous, million-degree gas that surrounds the Milky Way, detectable in X-rays and in absorption against distant sources. This hot corona is a reservoir of baryons and the medium through which fresh gas accretes onto the Galaxy and enriched gas is expelled.
Galaxy, objects & concepts
Across the Galaxy
Knowledge connections
- Associated withThe Milky Way
- Associated withDark Matter Halo
- Associated withThe Galactic Fountain
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.