The new star is a close binary system, one of the components of which is a white dwarf, and the other is a giant star with an extended atmosphere. Hydrogen flows from the giant to the white dwarf and accumulates. As the accumulation proceeds, conditions are created for a thermonuclear explosion – the conversion of hydrogen into helium. The explosion leads to the ejection of the outer layers of the star. We observe this phenomenon as a new star, because shine increases thousands of times.
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.