Stellar Prominence

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A stellar prominence is a bright extension of gas from the surface of a star. The frequency at which prominences appear and the length of time that a prominence lasts depend on the mass and age of the star.

Related Properties & Settings


  • Stellar prominences can be turned off using the Stellar Prominences toggle in the full Sim Settings Menu. The average Prominence Frequency and Prominence Duration can also be scaled in this section.


The frequency of a stellar prominence in Universe Sandbox is randomly chosen from a normal distribution with a mean value that depends on the star's mass and age. The mean value will be between once every hour and once every six hours. This mean value may also be scaled using the Prominence Frequency setting in the Sim Settings Menu.

The half-life of a prominence is randomly chosen between 20 second and 5 hours. The prominences are randomly positioned around the star's surface.