Answer: thermal pulsations as helium burning starts) until it is ~200 times the size it started. At the point it loses
its outer layers, exposing the core of the star, and its size drops to about 1/100th of its original size as a
hot and very bright White Dwarf star. This has no thermonuclear reactions supporting it, so it gradually
fades away.
2. When will the Sun be at its brightest? During the Asymptotic Giant Branch, when it is about 10,205.16
billion years old.
3. When will the Sun be at its hottest? During the Thermally-pulsing Asymptotic Giant Branch at 10209.76
billion years old.
4. In which stage of its life does the Sun spend the longest time? The Sun spends the most time on the
main sequence.
5. In which stage of life will the Sun undergo the most change? The Sun undergoes the most change in
size, luminosity and temperature between the two asymptotic giant branches.
6. What kind of star will the Sun be at the end of its life? A Carbon/Oxygen white dwarf.
7. How long will the Sun live for? 11,907.96 billion years
B. By adjusting the mass of the star in the “Star Properties” you can explore the evolution of different stars.
1. Where do the different mass stars lie on the main sequence? Smaller stars towards the bottom right,
more massive stars towards the upper left.
2. List the different final stages of a star’s life. Helium white dwarf, carbon/oxygen white dwarf, neutro
Step-by-step explanation: