Glossary
The English version of our glossary is currently under construction and will be regularly updated.
Solar activity
Changes in the sun’s properties, which are connected to turbulence in its extremely hot gas and constant changes in its magnetic field, are referred to as solar activity. The changes can be cyclical or irregular.
The sun is characterised by highly active periods, which manifest in the number of sunspots, radiation output, magnetic activity, and the emission of high-energy particles. These variations take place on time scales ranging from millions of years to minutes. See also solar cycle. Changes in the sun’s properties, which are connected to turbulence in its extremely hot gas and constant changes in its magnetic field, are referred to as solar activity. The changes can be cyclical or irregular.