Have you ever thought about the origin of the star placed on top of the Christmas tree? Today, I'd like to explain the significance of this star. What is the star on top of the Christmas tree? Investigation into the Identity of the Star of…

A commonly encountered symbol in astronomy and astrophysics books is the "circumpunct." In astrophysics, units such as and are used for mass and luminosity, respectively. They are read as "Solar Mass" and "Solar Luminosity," meaning "the m…