What is stellar cloud flow? please tell me

A star is a spherical luminous plasma condensed by gravity. The sun is the star closest to the earth. Almost all of the other stars that can be seen at night from Earth are within the Milky Way, but due to their great distances, these stars appear to be just fixed luminous points. Historically, the more prominent stars were grouped into constellations and asterisms, and the brightest stars had traditional names. Astronomers have assembled star catalogs that provide standards for naming many different stars. [1]?

At least for a period of the star's life, the star will undergo a nuclear fusion reaction in which hydrogen is fused into helium in the core, and energy is transferred outward from the interior of the star through a long path, and then from Surface radiation into outer space. Once the hydrogen in the core is exhausted, the star's life is about to end. Some stars will undergo stellar nucleosynthesis before the end of their lives; while some stars will undergo supernova nucleosynthesis before exploding, creating almost all natural elements heavier than helium. At the end of their lives, stars also contain degenerate matter. By observing its motion, brightness, and spectrum throughout, astronomers determine a star's mass, age, abundance of chemical elements, and many other properties. A star's total mass is a major factor in its evolution and determining its ultimate fate: a star's diameter, temperature, and other characteristics change at different stages of its life, while the environment surrounding the star affects its rotation and motion. . A graph depicting the temperature versus brightness of many stars, known as a H-R diagram, allows us to measure a star's age and evolutionary state. [1]?