progSun
ProgSun is a hypothetical concept within theoretical astrophysics, referring to a star that exhibits characteristics of both a pre-main-sequence star and a sun-like main-sequence star. This designation is not a formally recognized astronomical classification but rather a term used in discussions or thought experiments concerning stellar evolution. The idea of a progSun might arise when considering the transitional phases a star undergoes as it moves from its protostellar cloud stage towards achieving stable hydrogen fusion. During this phase, a star's luminosity and temperature are still fluctuating significantly, making it distinct from a fully established main-sequence star.
The concept of a progSun could also be explored in scenarios where a star's internal processes are