premainsequencefasen
The pre-main sequence phase, also known as the pre-main sequence (PMS) phase, is a critical stage in the life of a star, occurring before it begins nuclear fusion in its core. This phase is particularly relevant to low-mass stars, including our Sun, and is characterized by the star's contraction and heating as it accumulates mass from its surrounding protostellar envelope.
During the PMS phase, a star is primarily supported by gravitational energy rather than nuclear fusion. As
As the star continues to contract, its core temperature eventually reaches the point where nuclear fusion can