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- Stellar evolution - In astronomy, stellar evolution is the process by which a star undergoes a sequence of radical changes during its lifetime. Depending on the mass of the star, this lifetime ranges from hundreds of thousands to billions of years.
- The Great Story - The Great Story, "The Epic of Evolution", and the "Story of the Universe", refer to mythopoetic language used by a social movement (or meta-religious movement) that tell the history of the Universe in ways that are simultaneously scientific and sacred. It is an articulation of the understandings of modern science – especially the evolutionary sciences ranging from stellar evolution to biological evolution and cultural evolution – as a sacred creation story, much like the traditional creation myths passed down through oral cultures and sacred texts.
- Young stellar object - Young stellar object (YSO) denotes a star in its early stage of evolution.
- Roger Cayrel - Roger Victor Emile Cayrel (born 4 December, 1925, Bordeaux, France) is a French astronomer. His main interests are stellar atmospheres, galactic chemical evolution and metal-poor stars.
- Initial mass function - The initial mass function (IMF) is an empirical function that describes the mass distribution (the histogram of stellar masses) of a population of stars in terms of their theoretical initial mass (the mass they were formed with). The properties and evolution of a star are closely related to its mass, so the IMF is an important diagnostic tool for astronomers studying large quantities of stars.