When does the helium flash occur?
A) When helium fusion begins in a low-mass star
B) When a planetary nebula is formed
C) When a Type II supernova is formed
D) When a pulsar is formed

Question

Quizplus · Accepted Answer

The helium flash occurs during the red giant phase of a low-mass star's evolution, when the temperature at the core reaches about 100 million K and helium fusion begins. This sudden onset of fusion causes a runaway reaction that briefly halts the collapse of the star and creates a burst of energy, but does not result in a catastrophic explosion like a Type II supernova.

When Does the Helium Flash Occur