In red giants and supergiants, thermonuclear reactions take place in a layered source gradually moving from the center to the surface. In the process of a supernova explosion, the shock wave for a short time heats the outer shell to such a high temperature that thermonuclear reactions also take place in it. Thermonuclear reactions can also occur in certain areas of a star’s surface if the temperature rises there to high values.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.