Stellar process
Stellar Magnetic Activity
A star's rotation and convection together drive a magnetic dynamo, giving rise to starspots, flares, and hot outer atmospheres, often waxing and waning in activity cycles. The Sun is the star whose magnetic activity we can watch in closest detail, but the same physics operates across the cool stars.
Stars, stages & concepts
Across stellar astrophysics
Knowledge connections
- Associated withStellar Rotation
- Associated withThe Sun
- Associated withStellar Rotation
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.