Question

end stage of stars having mass larger than 25 times the mass of the Sun ​

Answer 1

Answer:

The expanding star is now called a Red Giant. Stage 8 - The helium core runs out, and the outer layers drift of away from the core as a gaseous shell, this gas that surrounds the core is called a Planetary Nebula. Stage 9 - The remaining core (thats 80% of t