Solar atmosphere
The Transition Region
The thin, irregular layer between the chromosphere and the corona where the temperature climbs steeply — from around ten thousand to a million kelvin over only a few hundred kilometres. It radiates mostly in the extreme ultraviolet and is central to the still-open question of how the corona is heated.
Highlights
- ›Temperature leaps from ~10⁴ to ~10⁶ K across it
The Sun, its layers & phenomena
Across solar physics
Knowledge connections
- Associated withThe Chromosphere
- Associated withThe Sun
- Associated withThe Chromosphere
- Associated withThe Solar Corona
- Associated withThe Coronal Heating Problem
- Associated withThe Solar Corona
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.