blandingstid

Blandingstid, also known as the "blending period" or "transition phase," refers to a period in the life of a star where it undergoes significant changes in its internal structure and energy production. This phase typically occurs during the late stages of a star's life, after it has exhausted the hydrogen fuel in its core and has transitioned from the main sequence to the red giant branch. During blandingstid, the star's core contracts and heats up, while the outer layers expand and cool, causing the star to increase in size and luminosity. This process can lead to the formation of a helium-burning shell around the core, which is a key characteristic of the asymptotic giant branch (AGB) phase. The duration of blandingstid varies depending on the star's mass, but it is generally a relatively short phase in the star's life, lasting only a few million years. After blandingstid, the star may undergo further evolutionary changes, such as the formation of a planetary nebula and the eventual cooling and contraction of the stellar remnant.